Producers (plants); Primary Consumers (herbivores); Secondary Consumers (carnivores). trophic levels. In general, for coral reef food webs it is somewhat simpler to consider only these three basic trophic levels. read more
Quick Answer. Omnivores living on coral reefs include fishes, crabs and other crustaceans. Coral fishes feed on algae and animals, whereas crabs consume algae, bacteria, fungi, mollusks and worms. The diet of crabs also includes detritus and other crustaceans. read more