Bizarre and Beautiful Coral Reef Animals

From parrotfish that cover themselves in a blanket of their own mucus to tiny pygmy sea horses, there are some bizarre sea creatures that live in coral reefs. In this slideshow you can explore some of the oddest and most amazing ones there are to see. Take a look at corals that can burn, and learn what fish mark a healthy reef.

Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Spotfin lionfish in Caribbean watersParrotfish in Mucus CocoonTwo bright orange anemonefish poke their heads between anemone tentacles.Photograph from above of a lavender-colored sea-slug with deep purple markings, swimming above a pink and orange surface.Green Sea Turtle, Armeñime, Tenerife, Canary Islands, Spain Crown of Thorns Starfish in the Marianas IslandsA bluefin trevally swims in Hawaii’s Maro Coral Reef, part of the Papahānaumokuākea Marine National Monument.Pygmy Seahorse Blends Into its EnvironmentCoral Head Near Pearl and Hermes Atoll, HawaiiAn underwater photo of a yellow-mouth moray eel. A school of Hawaiian squirrelfish. A stingray swims in an Australian marine reserve. Photograph of a bristly brown and white worm, with one end pressed against a pale green coral.A wrought iron butterflyfish being cleaned by a small wrasse in the waters of Japan's Ogasawara Islands.Caribbean reef sharks swim over a coral reef in the Bahamas.A white crab hides among coral polyps of the same color.