brine shrimp

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various small crustaceans of the genus Artemia that inhabit highly saline ponds and lakes and are often used as food for farmed fish and shellfish and for aquarium fish.

from The Century Dictionary.

• noun A small bran-chiopodous crustacean, Artemia salina, found in brackish water and in brine. See Artemia. Also called brine-worm.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun An aquatic crustacean of the taxonomic order Artemia, one species of which is often marketed under the name Sea-Monkey as a novelty gift.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun common to saline lakes