From Ohio History Central
Revision as of 14:26, 23 May 2013 by Admin (Talk | contribs)

File:Dorsal Fin.jpg
A dorsal fin is a fin located on the backs of some fish, whales, dolphins, and porpoises, as well as the (extinct) ichthyosaurs.

On or near the back. Example: dorsal fin- a fish's fin located on its back.