Boto

Common card · No. 405648

Boto is a Portuguese terminology often used to describe river dolphins, particularly those native to the Amazon and the Orinoco River tributaries (even though some species are native to salt or brackish water environments), as well as some species of oceanic dolphins and porpoises. The most famous example is the Amazon river dolphin. They are usually pink in color and tends to become more pink in age. The degree of pinkness would be a sign of maturity in males and could therefore have the same display function as antlers in red deer or the tusk in narwhals. They become more pink in age because of scar tissue that takes over their whole body. They also lose some of their pigment throughout their adolescence, turning them light pink.

Read on Wikipedia · Image Dennis Otten, CC BY-SA 3.0