dorsal dorsalof or pertaining to the upper surface. Related Articles: Glossary: dorsal finBlue WhaleAmazon River Dolphin, BotoHow do fish produce sounds?Baiji, Yangtze River DolphinSnapping ShrimpHow do marine invertebrates produce sounds?Feature Sound: Bottlenose DolphinDugong (Dugong Dugon)Gray Whale Chris Knowlton2017-02-26T20:10:08-05:00