The skin of a green moray eel is not actually green, but dark blue. Yellowish algae live in the slime that covers the eel's skin, and these colors combine to make the animal appear green. These animals hunt mostly at night for a variety of small fish and crustaceans.
Moray eels are the top predators within their reef environment.
Some species of morays even eat other eels. To find food, green morays follow their noses. These eels are both nearsighted and colorblind, and react to the scent of food by darting around the tank following a scent. Morays continually open and close their mouths, showing off their impressive teeth. Double-hinged mouths allow the moray to open and close its mouth both vertically and horizontally.