BY AMANDA BROSS
TYPE OF SYMMETRY: Bilateral Symmetry
TYPE OF FEEDER/EATER: Filter Feeders
SPECIFIC FEATURES: Hard exoskeleton made of calcium, no internal skeleton, similar to other anthropods
There are over 500 different species of crabs.
Barnacles were not firmly accepted to be crustaceans until the 1830's.
Krill are considered to be a keystone species.