Sharks
Regal angelfish have multiple predators, including sharks. Tiger sharks, black-tipped reef sharks and white-tipped reef sharks all feed on fish, such as the regal angelfish that inhabit the borders of coral reefs, such as the Great Barrier Reef in Australia.
Marine Mammals
Marine mammals such as sea lions hunt around the edges and crevices of coral reefs for small fish, such as regal angelfish. Other marine mammals such as whales, dolphins and porpoises also feed on regal angelfish if the normally reclusive fish, which usually spend their days darting quickly from one reef crevice to another, uncharacteristically leave themselves open to attack.
Birds
More than 200 species of birds, including 40 species of sea birds, live near the Great Barrier Reef where many regal angelfish live. In other parts of the world where angelfish are prevalent, birds eat the fish when they are grazing or swimming in shallow waters. White breasted sea eagles, pelicans and sea gulls are some of the bird predators of regal angelfish.
Other Fish
Another predator of regal angelfish is other fish. Regal angelfish lay their eggs in the open sea. The eggs are tiny and often mingle with plankton and are consumed by plankton-eating fish. Regal angelfish live a solitary life, often hiding in reef crevices where they hide from their many predators and feed on sponges and small crustaceans.