Answer:
The Boto dolphin (Inia geoffrensis), inhabits the Amazon basin and part of the Orinoco river basin, so it has a wide variety of species available to eat, although it prefers fish since it feeds on more than 43 types, including the feared piranhas. Complementary this dolphin also eats crabs and turtles.
It consumes about 2.5% of its body weight daily.