river dolphin
English
Noun
river dolphin (plural river dolphins)
- Any dolphin that is found only in fresh or brackish water, now considered in one of three superfamilies Platanistoidea, †Lipotoidea, Inioidea, all in parvorder Odontoceti or in a grouping with hippopotamuses.
References
river dolphin on Wikipedia.Wikipedia - Odontoceti at the Tree of Life Web Project