Some sea anemones live in symbiosis with other animals. clownfish, Incognito goby, and arrow crabs may shelter among the tentacles of the anemone. Hermit crabs often have sea anemones on the shell they live in. Some anemones have a symbiosis with a type of algae which lives inside them. This is the same thing many corals do. The dinoflagellate algae use sunlight to make food, and the anemone uses some of the food.