The endemic Hawaiian pom-pom crab or boxer crab, Lybia edmondsoni, is associated with anemones, Triactis sp, that it carries around holding with the claws and using them for defense, waving in front of the possible aggressor. This is a mutualistic symbiosis, the benefit for the anemone is in being transported around, with more ease in finding the food. Hawaii. (Photo by: David Fleetham/VW PICS/UIG)