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Tucuxi Sotalia fluviatilis
Tucuxi, small freshwater dolphins of Peru Ecuador Colombia and Brazil are Endangered due to fishing nets, deforestation, mercury poisoning from gold mining.Palm Oil Detectives
Indigenous Peoples Fight Climate Change
In the wake of the worst wildfires in living memory in Mexico and Central America in 2024, news outlets were looking for someone to blame. Howler monkeys and many species of parrots perished in the blazes. Slash and burn farming practices by Belize‘s indigenous communities were singled out as a primary cause. Yet this knee-jerk reaction is not evidence based and doesn’t take into account forces like corporate landgrabbing for mining and agribusinesses like meat, soy and palm oil.Belize’s indigenous Maya communities are rebuilding stronger based on the collective notion of se’ komonil: reciprocity, solidarity, traditional knowledge, gender equity, togetherness and community.
In the wake of horrific #wildfires in #Belize and #Mexico caused by #climatechange, #indigenous #Maya are rebuilding using the notion of se’ komonil: reciprocity #community and solidarity. #indigenousrights #landrights #BoycottPalmOil @palmoildetect wp.me/pcFhgU-924
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Written by James Stinson, Senior Research Associate and Evaluation Specialist, Young Lives Research Lab, Faculty of Education, York University, Canada and Lee Mcloughlin, PhD student, Global Sociocultural Studies, Florida International University This article is republished from The Conversation under a Creative Commons license. Read the original article.
Driven by extreme heat and drought, some of the worst wildfires in living memory raged across Mexico and Central America through April and May 2024.
News agencies reported howler monkeys dropping dead from trees, and parrots and other birds falling from the skies.
In Belize, a state of emergency was declared as wildfires burned tens of thousands of hectares of highly bio-diverse forest. Farmers suffered huge losses as fires destroyed crops and homes, and communities across the country suffered from hazardous air quality and hot, sleepless nights. Many risked their lives to fight off the approaching fires.
As the wildfire crisis subsided with rains in June, public attention shifted toward identifying the causes and allocating blame. Many singled out the “slash and burn” farming practices in Belize’s Indigenous communities as the primary cause. This simple knee-jerk reaction ignores the underlying causes of the climate crisis, are scientifically unfounded and stoke resentment of Indigenous Peoples.
Fanning the flames
On June 5, one of Belize’s major news networks ran a story with the headline “Are Primitive Farming Techniques Responsible for Wildfires?” The story placed blame for Belize’s wildfires on “slash-and-burn farming”, arguing that “there has to be a shift away from this destructive means of agriculture.”
The story was followed by an op-ed published online asserting that “because of the increased amounts of escaped agricultural fires, aided by climate change, global warming and drought, slash and burn has become more of a problem than the solution it once was.” This sentiment was further reinforced by Belize’s prime minister, who declared that “slash аnd burn has to be something of the past.”
While some of the recent fires in Belize were connected to agricultural burning — and poorly managed fire-clearing practices can have negative air-quality impacts — blaming “slash and burn” for the wildfire crisis ignores the larger context and conditions that made it possible, namely global warming.
May 2024 was the hottest and driest month in Belize’s history. This extreme heat is part of a broader global trend, with June 2024 marking the 13th consecutive “hottest month on record” globally.
More fundamentally, these statements confuse other forms of slash-and-burn agriculture with the distinct “milpa” systems employed by Indigenous people in Belize.
Indigenous knowledge undermined
Throughout Belize, Indigenous Maya farmers commonly practise a form of agriculture referred to as milpa in which fire is used to clear fields and fertilize the soil. Within this system, small areas of forest are chopped down, burned, and planted with maize, beans, squash and other crops. After being cultivated for a year or two, the field is then left fallow and allowed to regenerate back to forest cover while the farmers move on to a new area within a cyclical pattern where areas are reused after a regenerative period.
Commonly derided as slash-and-burn farming, milpa has long been perceived as environmentally destructive. This perspective has been perpetuated by long-standing myths and misconceptions that portray the farming practices of non-Europeans, and specifically the use of fire, as wasteful and irrational.
In Belize, this negative view of slash and burn has driven many colonial and post-colonial interventions to modernize Maya farming practices.
Recent research, however, has shown that the lands of Indigenous Peoples around the world have reduced deforestation and degradation rates relative to non-protected areas. The southern Toledo district of Belize, where the majority of Maya communities are located, boasts a forest cover rate of 71 per cent, significantly higher than the national average of 63 per cent.
Further research has found that the species composition of contemporary Mesoamerican forests has been shaped by the agricultural practices of ancient Maya farmers.
In Belize, fire has been found to play a role in promoting ecosystem health and resilience and intermediate levels of forest disturbance caused by milpa can increase species diversity. Well-managed milpa farming can support soil fertility, result in long-term carbon sequestration and enriched woodland vegetation.
Research has also shown that previous studies of deforestation in southern Belize significantly overestimated the rate of deforestation due to milpa agriculture by not accounting for its rotational process.
Many researchers now believe that milpa is a more benign alternative, in terms of environmental effects, than most other permanent farming systems in the humid tropics. Indeed, findings such as these have led to a growing appreciation for the role of Indigenous Peoples in advancing nature-based and life-enhancing climate solutions.
Unfortunately, research in the region has also found that climate change is undermining the ecological sustainability of milpa farming by forcing farmers to abandon traditional practices and adopt counterproductive measures in their struggle to adapt. In some cases, this has resulted in a decrease in the biodiversity and ecological resilience of the milpa system. This issue is compounded by the decreasing participation of young people, resulting in a further generational loss of traditional ecological knowledge.
Together, these issues are serving to alter and undermine a livelihood strategy that has proven sustainable for thousands of years. However, rather than call for Maya farmers to abandon slash and burn, we encourage support for the self-determined efforts of Maya communities to adapt to this changing climate. youtube.com/embed/ok787HRp_gA?… A video documenting the Maya response to the 2024 wildfire crisis.
Planting seeds of collaboration
Since winning a groundbreaking land rights claim in 2015, Maya communities in southern Belize have been working to promote an Indigenous future based on principles of reciprocity, solidarity, traditional knowledge, gender equity and, most significantly, se’ komonil, the Maya notion of togetherness and community.
Led by a collaboration of Maya leaders and non-governmental organizations, work toward this has included efforts to revitalize traditional institutions and governance systems, as well as the development of an Indigenous Forest Caring Strategy and fire-permitting system. In an effort to encourage and support the participation of youth in this process, Maya leaders have collaborated with the Young Lives Research Lab at York University to develop the Partnership for Youth and Planetary Wellbeing.
Building on previous research with Maya youth, the project has produced innovative youth-led research and education on the impacts of climate change, the importance of food sovereignty, traditional ecological knowledge and the struggle to secure Indigenous land rights in Maya communities. This work has been shared with global policymakers at the United Nations and local audiences in Belize.
Rather than fanning the flames of climate blame, we must work together to revitalize Indigenous knowledge systems and plant seeds of climate collaboration and care.
Written by James Stinson, Senior Research Associate and Evaluation Specialist, Young Lives Research Lab, Faculty of Education, York University, Canada and Lee Mcloughlin, PhD student, Global Sociocultural Studies, Florida International University This article is republished from The Conversation under a Creative Commons license. Read the original article.
ENDS
Read more about human rights abuses and child slavery in the palm oil and gold mining industries
SOCFIN’s African Empire of Colonial Oppression: Billionaires Profit from Palm Oil and Rubber Exploitation
Investigation by Bloomberg exposes that despite being RSPO members, #SOCFIN plantations in #WestAfrica are the epicentre of #humanrights abuses, sexual coercion, environmental destruction, and #landgrabbing. Operating in #Liberia, #Ghana, #Nigeria, and beyond, SOCFIN’s…
Palm Oil Threatens Ancient Noken Weaving in West Papua
Colonial palm oil and sugarcane causing the loss of West Papuans’ cultural identity. Land grabs force communities from forests, threatening Noken weaving
Family Ties Expose Deforestation and Rights Violations in Indonesian Palm Oil
An explosive report by the Environment Investigation Agency (EIA) details how Indonesia’s Fangiono family, through a wide corporate web, is linked to ongoing #deforestation, #corruption, and #indigenousrights abuses for #palmoil. Calls mount for…
West Papuan Indigenous Women Fight Land Seizures
Indigenous Melanesian women in West Papua fight land seizures for palm oil and sugar plantations, protecting their ancestral rights. Join #BoycottPalmOil
Greasing the Wheels of Colonialism: Palm Oil Industry in West Papua
A landmark study published in Global Studies Quarterly in April 2025 has revealed that the rapid expansion of the #palmoil industry in #WestPapua is not only fuelling #deforestation, #ecocide and environmental destruction but…
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2. Contribute stories: Academics, conservationists, scientists, indigenous rights advocates and animal rights advocates working to expose the corruption of the palm oil industry or to save animals can contribute stories to the website.
Wildlife Artist Juanchi Pérez
Mel Lumby: Dedicated Devotee to Borneo’s Living Beings
Anthropologist and Author Dr Sophie Chao
Health Physician Dr Evan Allen
The World’s Most Loved Cup: A Social, Ethical & Environmental History of Coffee by Aviary Doert
How do we stop the world’s ecosystems from going into a death spiral? A #SteadyState Economy
3. Supermarket sleuthing: Next time you’re in the supermarket, take photos of products containing palm oil. Share these to social media along with the hashtags to call out the greenwashing and ecocide of the brands who use palm oil. You can also take photos of palm oil free products and congratulate brands when they go palm oil free.
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#belize #boycottPalmOil #boycottpalmoil #childLabour #childSlavery #climatechange #community #goldMining #humanRights #hunger #indigenous #indigenousActivism #indigenousKnowledge #indigenousRights #indigenousrights #landRights #landgrabbing #landrights #maya #mexico #palmOil #poverty #slavery #wildfires
Partnership for Youth and Planetary Wellbeing Present Results at the Society for Applied Anthropology Conference - Dahdaleh Institute for Global Health Research
Dahdaleh research fellow James Stinson and research assistant Lee Mcloughlin recently presented at the Society for Applied Anthropology annual conference in Santa Fe, New Mexico on a panel titled "Decolonizing Alliances for the Post-Carbon Transition…hnawu (Dahdaleh Institute for Global Health Research)
Channel-billed Toucan Ramphastos vitellinus
Deep in the heart of the #Amazon rainforest, a flash of vibrant colour moves between the towering canopy trees. The Channel-billed #Toucan Ramphastos vitellinus is a striking bird endemic to #Colom…Palm Oil Detectives
Tucuxi Sotalia fluviatilis
Tucuxi Sotalia fluviatilis
IUCN Red List Status: Endangered
Location: #Brazil, #Peru, #Colombia, #Ecuador
Found throughout the #Amazon and Solimões River systems, including major tributaries and large lakes. Their range spans lowland rainforest areas of Brazil, southeastern Colombia, eastern Ecuador, and southern Peru.
The #Tucuxi, a small freshwater #dolphin of #Peru, #Ecuador, #Colombia and #Brazil now faces a dire future. Once common throughout the Amazon River system, they are now listed as #Endangered due to accelerating population declines. Threats include drowning in fishing nets, deforestation, mercury poisoning from gold mining, #palmoil run-off, oil drilling, and dam construction. A shocking 97% decline was recorded over 23 years in a single Amazon reserve. Without urgent action, this elegant and playful river dolphin could vanish from South America’s waterways. Use your wallet as a weapon against extinction. Choose palm oil-free, and #BoycottGold #BoycottPalmOil #Boycott4Wildlife
Playful and intelligent #Tucuxi are small #dolphins 🐬 of #Amazonian rivers in #Peru 🇵🇪 #Brazil 🇧🇷 #Ecuador 🇪🇨 and #Colombia 🇨🇴. #PalmOil and #GoldMining are major threats 😿 Fight for them! #BoycottGold #BoycottPalmOil #Boycott4Wildlife @palmoildetect palmoildetectives.com/2025/11/…
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Clever and joyful #Tucuxi are #dolphins 🐬💙 endangered by #hunting #gold #mining and contamination of the Amazon river 🇧🇷 for #PalmOil #agriculture ☠️ Use your wallet as a weapon and #BoycottGold 🥇🚫 #BoycottPalmOil 🌴🚫 #Boycott4Wildlife @palmoildetect palmoildetectives.com/2025/11/…
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Appearance & Behaviour
Tucuxis are often mistaken for their oceanic dolphin cousins due to their streamlined bodies, short beaks, and smooth, pale-to-dark grey skin. But these freshwater dolphins are wholly unique—adapted to life in winding river systems where water levels rise and fall dramatically with the seasons.
What sets them apart is their remarkable intelligence and tightly knit social groups. Tucuxis are playful and curious by nature. They leap from the water in graceful arcs, sometimes spinning mid-air.
The Tucuxi, sometimes called the ‘grey dolphin’ due to their uniform colouring, resembles a smaller oceanic dolphin, with a streamlined body and slender beak. Their colour varies from pale grey on the belly to darker grey or bluish-grey along the back.
They travel in small groups of two to six, displaying coordinated swimming patterns. In rare cases, they may form groups up to 26 individuals, particularly at river confluences. Known for their agility, they leap and spin in the water with a grace that belies their size. Tucuxis are particularly drawn to dynamic habitats like river junctions, where waters mix and fish gather.
Threats
- Widespread deforestation from palm oil plantations Palm oil plantations are rapidly expanding across the Amazon, clearing vast tracts of forest that stabilise riverbanks and filter water. This deforestation leads to increased sedimentation in rivers, altering flow patterns and reducing water clarity—conditions that directly disrupt the Tucuxi’s feeding and movement. Run-off from fertilisers and pesticides used in palm oil monocultures also poisons aquatic ecosystems, harming Tucuxis other Amazonian dolphin species and the fish they rely on.
- Toxic mercury pollution from gold mining Artisanal and illegal gold mining in the Amazon releases massive quantities of mercury into the water, contaminating fish and other aquatic organisms. Tucuxis, as top predators, ingest this mercury through their prey, which accumulates in their tissues and causes neurological damage, weakened immunity, and reproductive failure. Mercury exposure is one of the most insidious threats, as it persists in ecosystems long after mining has ceased.
- Incidental drowning in fishing nets Tucuxis are frequently caught and killed in gillnets and other fishing gear as bycatch. Tucuxis and other Amazonian dolphins often inhabit the same confluence zones and productive fishing grounds targeted by local communities, making entanglement almost inevitable. Many carcasses are never recovered, having either been discarded by fishers or lost to river currents, meaning actual mortality rates are likely far higher than reported.
- Deliberate hunting for use as fish bait Though illegal, Tucuxis continue to be targeted and killed in parts of Brazil, especially near the Mamirauá and Amana Reserves, where they are used as bait in the piracatinga (catfish) fishery. This brutal practice involves harpooning or netting dolphins and using their flesh to lure fish, often alongside the killing of Botos. Despite a national ban, weak enforcement and ongoing demand mean this threat persists in remote and lawless regions.
- Illegal fishing with explosives and toxins In certain areas, particularly in Brazil and Peru, fishers use home-made explosives and poisoned bait to stun or kill fish en masse. These destructive methods harm or kill Tucuxis who are attracted by the sudden appearance of dead or stunned prey. The concussive force of explosions and the ingestion of poisoned prey result in slow, agonising deaths for affected dolphins.
- Construction of hydroelectric dams Dams fragment Tucuxi populations by blocking their movement along river corridors, reducing access to feeding and breeding grounds. These projects alter seasonal water flow, raise water temperatures, and flood critical habitats—conditions that significantly disrupt dolphin ecology. Brazil alone has 74 operational dams in the Amazon basin, with over 400 more planned, posing a long-term existential threat to freshwater cetaceans.
- Run-off and contamination from palm oil, soy and meat agriculture In addition to habitat loss, palm oil and soy plantations along with cattle ranching generates enormous volumes of chemical-laden waste, which enters waterways and poisons aquatic life. This pollution affects Tucuxis both directly and indirectly—exposing them to harmful substances and killing off sensitive fish species. As plantations replace biodiverse forests, the ecosystem becomes less resilient, accelerating the decline of species like the Tucuxi.
- Bioaccumulation of heavy metals and industrial pollutants Tucuxis, like many river dolphins, suffer from exposure to persistent organic pollutants such as PCBs, DDT, and flame retardants, as well as heavy metals like lead and cadmium. These toxins accumulate in dolphin tissues over time, weakening their immune systems, interfering with reproduction, and making them more vulnerable to disease. Contaminants originate from industrial waste, agriculture, and mining, and are now widespread across the Amazon basin.
- Habitat fragmentation from infrastructure and oil development Roads, oil pipelines, and shipping corridors criss-cross many parts of the Tucuxi’s range, slicing through their habitat and increasing the risk of collisions with boats. These developments also bring noise pollution, which can interfere with echolocation and communication. Fragmentation leads to isolated subpopulations, reducing genetic diversity and making recovery more difficult.
Geographic Range
The Tucuxi inhabits the Amazon River basin, spanning: Brazil, Peru, Colombia, Ecuador These river dolphins occur as far west as southern Peru and eastern Ecuador, and as far north as southeastern Colombia. They are notably absent from Bolivia’s Beni/Mamoré system, the Orinoco basin, and upper reaches above major waterfalls or rapids.
Their range includes wide, deep rivers and lakes, avoiding turbulent rapids and shallow areas. Despite overlapping with the Amazon River Dolphin (Inia geoffrensis), Tucuxis do not enter flooded forest habitats and stay closer to main river channels.
Diet
Tucuxis feed on more than 28 species of small, schooling freshwater fish, including members of the characid, sciaenid, and siluriform families. During the dry season, fish are concentrated in shrinking waterways, making them easier to catch. In contrast, flooding season disperses prey into forested areas, beyond the Tucuxi’s reach. They prefer to feed at river junctions and along confluences, where nutrient-rich waters concentrate fish populations.
Mating and Reproduction
Little is known about their mating behaviours. However, individuals appear to remain within familiar ranges for many years, and females likely give birth to a single calf after a long gestation. Calves are dependent for an extended period, learning complex navigation and foraging skills in rapidly changing river systems. The estimated generation length is 15.6 years.
FAQs
How many Tucuxis are left in the wild?
There is no comprehensive global population estimate. However, surveys from 1994–2017 in Brazil’s Mamirauá Reserve show a 7.4% annual decline—amounting to a 97% drop over three generations (da Silva et al., 2020). If this trend reflects the wider Amazon basin, the species could be on the brink of collapse.
How long do Tucuxis live?
Exact lifespans are unknown, but based on reproductive data and life history modelling, their generation length is around 15.6 years (Taylor et al., 2007), suggesting natural lifespans of 30–40 years.
How are palm oil and gold mining affecting Tucuxis?
Out-of-control palm oil expansion results in massive deforestation and run-off, clogging rivers with sediment and toxic agrochemicals. Gold mining adds mercury into aquatic ecosystems, where it bioaccumulates in fish—Tucuxis’ main food source. These pollutants cause reproductive harm, neurological damage, and immune system failure in dolphins.
Do Tucuxis make good pets and should they be kept in zoos?
Absolutely not. Tucuxis are intelligent, wild animals. Keeping them in captivity is deeply cruel and has no conservation benefit. Wild capture destroys families and can devastate local populations. If you care about these dolphins, say no to the exotic pet trade and the cruel zoo trade.
What habitats do they prefer?
Research in Peru’s Pacaya-Samiria Reserve shows that Tucuxis prefer river confluences and wide channels, particularly during the dry season when fish density is higher (Belanger et al., 2022). Feeding activity is especially concentrated in areas where whitewater rivers meet blackwater tributaries, creating nutrient-rich hotspots.
Take Action!
The Tucuxi is vanishing before our eyes. To protect them:
• Boycott palm oil and gold products linked to Amazon destruction.
• Choose fish-free and vegan products to reduce pressure on river ecosystems.
• Support indigenous-led conservation across the Amazon.
• Campaign for a ban on destructive dams, and the end of illegal fishing.
#BoycottPalmOil #Boycott4Wildlife #Vegan #BoycottMeat
Support the Tucuxi by going vegan and boycotting palm oil in the supermarket, it’s the #Boycott4Wildlife
Support the conservation of this species
This animal has no protections in place. Read about other forgotten species here. Create art to support this forgotten animal or raise awareness about them by sharing this post and using the #Boycottpalmoil #Boycott4Wildlife hashtags on social media. Also you can boycott palm oil in the supermarket.
Further Information
Belanger, A., Wright, A., Gomez, C., Shutt, J.D., Chota, K., & Bodmer, R. (2022). River dolphins (Inia geoffrensis and Sotalia fluviatilis) in the Peruvian Amazon: habitat preferences and feeding behaviour. Latin American Journal of Aquatic Mammals, 17(1). doi.org/10.5597/lajam00268
da Silva, V., Martin, A., Fettuccia, D., Bivaqua, L. & Trujillo, F. 2020. Sotalia fluviatilis. The IUCN Red List of Threatened Species 2020: e.T190871A50386457. dx.doi.org/10.2305/IUCN.UK.202…. Accessed on 06 April 2025.
Monteiro-Neto, C., Itavo, R. V., & Moraes, L. E. S. (2003). Concentrations of heavy metals in Sotalia fluviatilis (Cetacea: Delphinidae) off the coast of Ceará, northeast Brazil. Environmental Pollution, 123(2), 319–324. doi.org/10.1016/S0269-7491(02)…
How can I help the #Boycott4Wildlife?
Take Action in Five Ways
1. Join the #Boycott4Wildlife on social media and subscribe to stay in the loop: Share posts from this website to your own network on Twitter, Mastadon, Instagram, Facebook and Youtube using the hashtags #Boycottpalmoil #Boycott4Wildlife.
Enter your email address
Sign Up
Join 3,172 other subscribers
2. Contribute stories: Academics, conservationists, scientists, indigenous rights advocates and animal rights advocates working to expose the corruption of the palm oil industry or to save animals can contribute stories to the website.
Wildlife Artist Juanchi Pérez
Mel Lumby: Dedicated Devotee to Borneo’s Living Beings
Anthropologist and Author Dr Sophie Chao
Health Physician Dr Evan Allen
The World’s Most Loved Cup: A Social, Ethical & Environmental History of Coffee by Aviary Doert
How do we stop the world’s ecosystems from going into a death spiral? A #SteadyState Economy
3. Supermarket sleuthing: Next time you’re in the supermarket, take photos of products containing palm oil. Share these to social media along with the hashtags to call out the greenwashing and ecocide of the brands who use palm oil. You can also take photos of palm oil free products and congratulate brands when they go palm oil free.
twitter.com/CuriousApe4/status…
twitter.com/PhillDixon1/status…
twitter.com/mugabe139/status/1…
4. Take to the streets: Get in touch with Palm Oil Detectives to find out more.
5. Donate: Make a one-off or monthly donation to Palm Oil Detectives as a way of saying thank you and to help pay for ongoing running costs of the website and social media campaigns. Donate here
Learn about other animals endangered by palm oil and other agriculture
Global
South America
S.E. Asia
India
Africa
West Papua & PNG
Frill-Necked Lizard Chlamydosaurus kingii
Grey Crowned Crane Balearica regulorum
Ecuadorean Viscacha Lagidium ahuacaense
Southern Pudu Pudu puda
Blue-streaked Lory Eos reticulata
Blonde Capuchin Sapajus flavius
Learn about “sustainable” palm oil greenwashing
Read more about RSPO greenwashing
Lying
Fake labels
Indigenous Land-grabbing
Human rights abuses
Deforestation
Human health hazards
A 2019 World Health Organisation (WHO) report into the palm oil industry and RSPO finds extensive greenwashing of palm oil deforestation and the murder of endangered animals (i.e. biodiversity loss)
#agriculture #amazon #amazonRainforest #amazonia #amazonian #animalCruelty #animals #boycott4wildlife #boycottgold #boycottmeat #boycottpalmoil #brazil #colombia #dams #deforestation #dolphin #dolphins #ecuador #endangered #endangeredSpecies #forgottenAnimals #gold #goldMining #goldmining #humanWildlifeConflict #hunting #hydroelectric #mammal #mining #palmOil #palmOilDeforestation #palmoil #peru #poaching #saynotogold #tucuxi #tucuxiSotaliaFluviatilis #vegan
Did you know that gold kills indigenous people and rare animals?
Gold mining kills indigenous peoples throughout the world like the Yanomami people of Brazil and Papuans in West Papua. The bloody, violent and greedy landgrabbing that goes on for gold forces indi…Palm Oil Detectives
Playful and intelligent #Tucuxi are small #dolphins 🐬 of #Amazonian rivers in #Peru 📷 #Brazil 📷 #Ecuador 📷 and #Colombia 📷. #PalmOil and #GoldMining are major threats 😿 Fight for them! #BoycottGold #BoycottPalmOil #Boycott4Wildlife @palmoildetectives palmoildetectives.com/2025/11/…
Tucuxi Sotalia fluviatilis
Tucuxi Sotalia fluviatilis
IUCN Red List Status: EndangeredLocation: #Brazil, #Peru, #Colombia, #Ecuador
Found throughout the #Amazon and Solimões River systems, including major tributaries and large lakes. Their range spans lowland rainforest areas of Brazil, southeastern Colombia, eastern Ecuador, and southern Peru.
The #Tucuxi, a small freshwater #dolphin of #Peru, #Ecuador, #Colombia and #Brazil now faces a dire future. Once common throughout the Amazon River system, they are now listed as #Endangered due to accelerating population declines. Threats include drowning in fishing nets, deforestation, mercury poisoning from gold mining, #palmoil run-off, oil drilling, and dam construction. A shocking 97% decline was recorded over 23 years in a single Amazon reserve. Without urgent action, this elegant and playful river dolphin could vanish from South America’s waterways. Use your wallet as a weapon against extinction. Choose palm oil-free, and #BoycottGold #BoycottPalmOil #Boycott4WildlifePlayful and intelligent #Tucuxi are small #dolphins 🐬 of #Amazonian rivers in #Peru 🇵🇪 #Brazil 🇧🇷 #Ecuador 🇪🇨 and #Colombia 🇨🇴. #PalmOil and #GoldMining are major threats 😿 Fight for them! #BoycottGold #BoycottPalmOil #Boycott4Wildlife @palmoildetect palmoildetectives.com/2025/11/…
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Share to TwitterClever and joyful #Tucuxi are #dolphins 🐬💙 endangered by #hunting #gold #mining and contamination of the Amazon river 🇧🇷 for #PalmOil #agriculture ☠️ Use your wallet as a weapon and #BoycottGold 🥇🚫 #BoycottPalmOil 🌴🚫 #Boycott4Wildlife @palmoildetect palmoildetectives.com/2025/11/…
Share to BlueSky
Share to TwitterAppearance & Behaviour
Tucuxis are often mistaken for their oceanic dolphin cousins due to their streamlined bodies, short beaks, and smooth, pale-to-dark grey skin. But these freshwater dolphins are wholly unique—adapted to life in winding river systems where water levels rise and fall dramatically with the seasons.What sets them apart is their remarkable intelligence and tightly knit social groups. Tucuxis are playful and curious by nature. They leap from the water in graceful arcs, sometimes spinning mid-air.
The Tucuxi, sometimes called the ‘grey dolphin’ due to their uniform colouring, resembles a smaller oceanic dolphin, with a streamlined body and slender beak. Their colour varies from pale grey on the belly to darker grey or bluish-grey along the back.
They travel in small groups of two to six, displaying coordinated swimming patterns. In rare cases, they may form groups up to 26 individuals, particularly at river confluences. Known for their agility, they leap and spin in the water with a grace that belies their size. Tucuxis are particularly drawn to dynamic habitats like river junctions, where waters mix and fish gather.
Threats
- Widespread deforestation from palm oil plantations Palm oil plantations are rapidly expanding across the Amazon, clearing vast tracts of forest that stabilise riverbanks and filter water. This deforestation leads to increased sedimentation in rivers, altering flow patterns and reducing water clarity—conditions that directly disrupt the Tucuxi’s feeding and movement. Run-off from fertilisers and pesticides used in palm oil monocultures also poisons aquatic ecosystems, harming Tucuxis other Amazonian dolphin species and the fish they rely on.
- Toxic mercury pollution from gold mining Artisanal and illegal gold mining in the Amazon releases massive quantities of mercury into the water, contaminating fish and other aquatic organisms. Tucuxis, as top predators, ingest this mercury through their prey, which accumulates in their tissues and causes neurological damage, weakened immunity, and reproductive failure. Mercury exposure is one of the most insidious threats, as it persists in ecosystems long after mining has ceased.
- Incidental drowning in fishing nets Tucuxis are frequently caught and killed in gillnets and other fishing gear as bycatch. Tucuxis and other Amazonian dolphins often inhabit the same confluence zones and productive fishing grounds targeted by local communities, making entanglement almost inevitable. Many carcasses are never recovered, having either been discarded by fishers or lost to river currents, meaning actual mortality rates are likely far higher than reported.
- Deliberate hunting for use as fish bait Though illegal, Tucuxis continue to be targeted and killed in parts of Brazil, especially near the Mamirauá and Amana Reserves, where they are used as bait in the piracatinga (catfish) fishery. This brutal practice involves harpooning or netting dolphins and using their flesh to lure fish, often alongside the killing of Botos. Despite a national ban, weak enforcement and ongoing demand mean this threat persists in remote and lawless regions.
- Illegal fishing with explosives and toxins In certain areas, particularly in Brazil and Peru, fishers use home-made explosives and poisoned bait to stun or kill fish en masse. These destructive methods harm or kill Tucuxis who are attracted by the sudden appearance of dead or stunned prey. The concussive force of explosions and the ingestion of poisoned prey result in slow, agonising deaths for affected dolphins.
- Construction of hydroelectric dams Dams fragment Tucuxi populations by blocking their movement along river corridors, reducing access to feeding and breeding grounds. These projects alter seasonal water flow, raise water temperatures, and flood critical habitats—conditions that significantly disrupt dolphin ecology. Brazil alone has 74 operational dams in the Amazon basin, with over 400 more planned, posing a long-term existential threat to freshwater cetaceans.
- Run-off and contamination from palm oil, soy and meat agriculture In addition to habitat loss, palm oil and soy plantations along with cattle ranching generates enormous volumes of chemical-laden waste, which enters waterways and poisons aquatic life. This pollution affects Tucuxis both directly and indirectly—exposing them to harmful substances and killing off sensitive fish species. As plantations replace biodiverse forests, the ecosystem becomes less resilient, accelerating the decline of species like the Tucuxi.
- Bioaccumulation of heavy metals and industrial pollutants Tucuxis, like many river dolphins, suffer from exposure to persistent organic pollutants such as PCBs, DDT, and flame retardants, as well as heavy metals like lead and cadmium. These toxins accumulate in dolphin tissues over time, weakening their immune systems, interfering with reproduction, and making them more vulnerable to disease. Contaminants originate from industrial waste, agriculture, and mining, and are now widespread across the Amazon basin.
- Habitat fragmentation from infrastructure and oil development Roads, oil pipelines, and shipping corridors criss-cross many parts of the Tucuxi’s range, slicing through their habitat and increasing the risk of collisions with boats. These developments also bring noise pollution, which can interfere with echolocation and communication. Fragmentation leads to isolated subpopulations, reducing genetic diversity and making recovery more difficult.
Geographic Range
The Tucuxi inhabits the Amazon River basin, spanning: Brazil, Peru, Colombia, Ecuador These river dolphins occur as far west as southern Peru and eastern Ecuador, and as far north as southeastern Colombia. They are notably absent from Bolivia’s Beni/Mamoré system, the Orinoco basin, and upper reaches above major waterfalls or rapids.Their range includes wide, deep rivers and lakes, avoiding turbulent rapids and shallow areas. Despite overlapping with the Amazon River Dolphin (Inia geoffrensis), Tucuxis do not enter flooded forest habitats and stay closer to main river channels.
Diet
Tucuxis feed on more than 28 species of small, schooling freshwater fish, including members of the characid, sciaenid, and siluriform families. During the dry season, fish are concentrated in shrinking waterways, making them easier to catch. In contrast, flooding season disperses prey into forested areas, beyond the Tucuxi’s reach. They prefer to feed at river junctions and along confluences, where nutrient-rich waters concentrate fish populations.Mating and Reproduction
Little is known about their mating behaviours. However, individuals appear to remain within familiar ranges for many years, and females likely give birth to a single calf after a long gestation. Calves are dependent for an extended period, learning complex navigation and foraging skills in rapidly changing river systems. The estimated generation length is 15.6 years.FAQs
How many Tucuxis are left in the wild?
There is no comprehensive global population estimate. However, surveys from 1994–2017 in Brazil’s Mamirauá Reserve show a 7.4% annual decline—amounting to a 97% drop over three generations (da Silva et al., 2020). If this trend reflects the wider Amazon basin, the species could be on the brink of collapse.How long do Tucuxis live?
Exact lifespans are unknown, but based on reproductive data and life history modelling, their generation length is around 15.6 years (Taylor et al., 2007), suggesting natural lifespans of 30–40 years.How are palm oil and gold mining affecting Tucuxis?
Out-of-control palm oil expansion results in massive deforestation and run-off, clogging rivers with sediment and toxic agrochemicals. Gold mining adds mercury into aquatic ecosystems, where it bioaccumulates in fish—Tucuxis’ main food source. These pollutants cause reproductive harm, neurological damage, and immune system failure in dolphins.Do Tucuxis make good pets and should they be kept in zoos?
Absolutely not. Tucuxis are intelligent, wild animals. Keeping them in captivity is deeply cruel and has no conservation benefit. Wild capture destroys families and can devastate local populations. If you care about these dolphins, say no to the exotic pet trade and the cruel zoo trade.What habitats do they prefer?
Research in Peru’s Pacaya-Samiria Reserve shows that Tucuxis prefer river confluences and wide channels, particularly during the dry season when fish density is higher (Belanger et al., 2022). Feeding activity is especially concentrated in areas where whitewater rivers meet blackwater tributaries, creating nutrient-rich hotspots.Take Action!
The Tucuxi is vanishing before our eyes. To protect them:• Boycott palm oil and gold products linked to Amazon destruction.
• Choose fish-free and vegan products to reduce pressure on river ecosystems.
• Support indigenous-led conservation across the Amazon.
• Campaign for a ban on destructive dams, and the end of illegal fishing.
#BoycottPalmOil #Boycott4Wildlife #Vegan #BoycottMeat
Support the Tucuxi by going vegan and boycotting palm oil in the supermarket, it’s the #Boycott4Wildlife
Support the conservation of this species
This animal has no protections in place. Read about other forgotten species here. Create art to support this forgotten animal or raise awareness about them by sharing this post and using the #Boycottpalmoil #Boycott4Wildlife hashtags on social media. Also you can boycott palm oil in the supermarket.Further Information
Belanger, A., Wright, A., Gomez, C., Shutt, J.D., Chota, K., & Bodmer, R. (2022). River dolphins (Inia geoffrensis and Sotalia fluviatilis) in the Peruvian Amazon: habitat preferences and feeding behaviour. Latin American Journal of Aquatic Mammals, 17(1). doi.org/10.5597/lajam00268da Silva, V., Martin, A., Fettuccia, D., Bivaqua, L. & Trujillo, F. 2020. Sotalia fluviatilis. The IUCN Red List of Threatened Species 2020: e.T190871A50386457. dx.doi.org/10.2305/IUCN.UK.202…. Accessed on 06 April 2025.
Monteiro-Neto, C., Itavo, R. V., & Moraes, L. E. S. (2003). Concentrations of heavy metals in Sotalia fluviatilis (Cetacea: Delphinidae) off the coast of Ceará, northeast Brazil. Environmental Pollution, 123(2), 319–324. doi.org/10.1016/S0269-7491(02)…
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Frill-Necked Lizard Chlamydosaurus kingii
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Learn about “sustainable” palm oil greenwashing
Read more about RSPO greenwashing
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Human health hazardsA 2019 World Health Organisation (WHO) report into the palm oil industry and RSPO finds extensive greenwashing of palm oil deforestation and the murder of endangered animals (i.e. biodiversity loss)
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Did you know that gold kills indigenous people and rare animals?
Gold mining kills indigenous peoples throughout the world like the Yanomami people of Brazil and Papuans in West Papua. The bloody, violent and greedy landgrabbing that goes on for gold forces indi…Palm Oil Detectives
Playful and intelligent #Tucuxi are small #dolphins 🐬 of #Amazonian rivers in #Peru 🇵🇪 #Brazil 🇧🇷 #Ecuador 🇪🇨 and #Colombia 🇨🇴. #PalmOil and #GoldMining are major threats 😿 Fight for them! #BoycottGold #BoycottPalmOil #Boycott4Wildlife
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Tucuxi Sotalia fluviatilis
Tucuxi, small freshwater dolphins of Peru Ecuador Colombia and Brazil are Endangered due to fishing nets, deforestation, mercury poisoning from gold mining.Palm Oil Detectives
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