Stomatopods are an ancient group of marine predators that are only distantly related to other more familiar crustaceans such as crabs, shrimp and lobsters. While most occur in shallow tropical marine waters, a few species are found in more temperate seas. Over the past few years, stomatopods, or mantis shrimp as they are commonly known, have become popular among aquarists and are becoming increasingly available from suppliers of marine invertebrates. While there are currently over 500 species of stomatopods recognized, only a handful of species are commonly found in the aquarium trade. In fact, over the years I have seen fewer than 40 species being sold or arriving as hitchhikers. To help with the identification and care of these stomatopods, I have provided the following list which is arranged alphabetically by genus. Hopefully this will aid you in identifying and maintaining these fascinating creatures. Roy Caldwell