The pink and gray river dolphins abound in our area of the Amazon River downstream from Iquitos. Some are so bold that they even slap their tails underneath the boat while we are watching.
The gray river dolphins are more common to see because they do not enter the seasonally flooded forest. The pink dolphins are adapted for flooded forest movement due to their reduced dorsal fin that allows uninhibited movement underneath the water and amongst the sunken trees and vines.
Take a peek at the YouTube video I put together for a quick sample of pink dolphin watching with Otorongo Expeditions