Crustaceans

By: Chanler Kroonemeyer

About Crustaceans

Crustaceans have a bilateral symmetry. Most of the over 30,000 different species of crustaceans are consumers and first-level consumers. All crustaceans lack the internal skeleton that other animal groups have. Also all crustaceans have a segmented body.

http://marinelife.about.com/od/invertebrates/g/crustaceans.htm