n., pl., shellfish, or -fish·es.
An aquatic animal, such as a mollusk or crustacean, that has a shell or shell-like exoskeleton.
shellfishing shell'fish'ing n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.