Definition of Amazon river dolphin
- Amazon river dolphins, or botos, have a curious habit: occasionally one will grab some river grass or a rock in its mouth and pop its head above the surface, showing its prize for all to see.
- —Henry Fountain, New York Times, 1 Apr. 2008
- At up to 450 pounds and eight feet in length, the Amazon dolphin, or boto, is the largest of the four known species of river dolphin.
- —Mark Jenkins, National Geographic, June 2009