They are notable for their mutualism with sea anemones, which grow on their claws for defense. In return, the anemones find new places to eat and mate. It rarely puts the anemones down and totes them through life.This is how the crab got its name. As it walks along, it looks as if it is carrying boxing gloves or pom-poms. The bonding with the anemone is not required for survival, however, and boxer crabs have frequently been known to live without them, sometimes substituting other organisms such as sponges and corals.