As frog-green fish dart through the leaves, the dolphins, pink as bubble gum ... the Amazon dolphin, or boto, is the largest of the four known species of river dolphin. The others live in the ...

The Amazon and Orinoco river basins still are home to a species known as the Amazon river dolphin, also called the pink river dolphin or boto.

In addition to spotting the pink river dolphin, scientists will also be on the look out for the grey river dolphin (Sotalia fluviatilis) — a dolphin species darker and smaller than the boto, with a ...