最終更新日:2024/08/05
(zoology) 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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river dolphin
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元となった辞書の項目
river dolphin
noun