Clownfish (Amphiprioninae) are small, brightly colored reef fish recognized for their orange, white, and black markings and their symbiotic relationship with sea anemones, which provide them protection from predators. There are at least 30 known species of clownfish   Diet: Clownfish are omnivores, feeding on algae, plankton, small crustaceans, and leftover food from their host anemones. They also help keep anemones clean by eating dead tentacles and debris.