Nudibranchs are an incredible sea animal that are commonly found along coral reefs. They are delicate in appearance, but very durable given the right conditions. Some nudibranchs graze coral reefs and rock reefs albeit slowly, looking for sponges and other small sessile invertebrates to eat. Others are perfectly reef safe and devour nuisance algae. Usually bright in color, and a clear warning to predators, nudibranchs are not consumed because they store poisonous chemicals in their tissues. Any would be predator instinctively knows to steer clear.