river dolphin

/R IH1 V ER0 D AA1 L F AH0 N/
noun
  1. 1

    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.

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Source: https://en.wiktionary.org/wiki/river%20dolphin