dorsal dorsalof or pertaining to the upper surface.Related Articles: Glossary: dorsal finAmazon River Dolphin, BotoHow do fish produce sounds?Baiji, Yangtze River DolphinSnapping ShrimpFeatured Sound: Beluga WhaleHow do marine invertebrates produce sounds?Humpback WhaleHow does marine life affect ocean sound levels?Dall's Porpoise Chris Knowlton2017-02-26T20:10:08-05:00