The RBINS has a rich collection of crustaceans. Within the class Malacostraca, we have large collections of decapods (crabs, shrimps, etc.), Euphausiacea (krill), Amphipoda (including eye-catching material from Antarctica), Cumacea (hooded shrimps), Isopoda, Mysida (opossum shrimps), and Tanaidae. Within the class Maxillopoda, our collection of copepods can safely be called impressive, with material from all over the world. The same is true of the class Ostracoda (seed shrimps), which has important freshwater and marine collections. Also the Branchiopoda (fairy shrimps, water fleas, etc.) are part of RBINS Recent Invertebrates collection. In total, the RBINS holds more than 210,000 crustacean specimens, including a 7800-some types.