Boxer crab or pom pom crab - Lybia edmondsoni (Arthropoda: Crustacea: Decapoda - http://eol.org/pages/312888/overview) Lybia are notable for their mutualism allowing stinging sea anemones, to grow on their claws for defense. In return, the anemones find new places to eat and mate. Boxer crabs use at least three different species of anemones, including a stinging sea anemone.
