OuiSi - Logo - Blk
Amazon River Dolphin
Inia geoffrensis


Rio Negro, Anavilhanas National Park, Novo Airão, Amazonas, Brazil




Inhabiting the river basins of Amazon and Orinoco in South America, the also called Pink river dolphin or "Boto" is the largest of the river dolphins species. Its pink color is due to a combination of factors such as repeated abrasion of the skin and scar tissue from social interactions, changes in blood flow and aging. Thus, adult males tend to be more pink, while newborns and young individuals are gray.

Photo Link


Learn More

Inae Guion
Biologist, Researcher, Visual Storyteller
Learn more about Inae Guion.

Explore more with OuiSi Nature

OuiSi Nature: 51 – Gyrfalcon – Kiliii Yuyan
OuiSi Nature: 13 – Purple Urchin on Kelp – Kate Vylet
OuiSi Nature: 39 – Desert Woodrat – Tania Escobar
OuiSi Nature: 87 – Bald Cypress – Kiliii Yuyan
OuiSi Nature: 121 – Lichen Huntsman Spider – Lenz Lim
OuiSi Nature: 20 – Parrot Snake – Jose G Martinez-Fonseca