Coleman Shrimps in Fire Urchin
Coleman shrimps (Periclimenes colemani) in their fire urchin (Asthenosoma varium) home. Coleman shrimps are only found on fire urchins and live in an obligate symbiosis with their host. They feed on the soft tube feet and tentacles of the sea urchin, which does not seem to be severely harmed. The venomous spines of the urchin provide an excellent defense from any would be predators too.