Moray eels are impressive fish that can grow up to 4m long, but the most commonly are about 1.50m long. There are over 200 species of moray eels. These fish have no scales and have a dorsal fin that extends to the tail. Moray eels hide in the underwater rocks, and wait for the night to come to hunt shrimp, octopus,and cuttlefish. Sometimes they even hunt together with grouper or other predatory fish.