David Fleetham / Undulated moray eel (Gymnothorax undulatus) with banded coral shrimp (Stenopus hispidus) inspecting its teeth, Hawaii.

David Fleetham / Undulated moray eel (Gymnothorax meleagris) swimming over reef at night. Hawaii.

Alex Mustard / Giant moray (Gymnothorax javanicus), Honeycomb moray (Gymnothorax favagineus) and Undulated moray (Gymnothorax undulatus) eels, four emerging from hole in coral reef. North Male Atoll, Maldives. India...

Linda Pitkin / Undulated moray (Gymnothorax undulatus) The Barge wreck, near Bluff Point, Gubal I., Gulf of Suez, Egypt, Red Sea.

Linda Pitkin / Undulated moray (Gymnothorax undulatus) The Barge wreck, near Bluff Point, Gubal I., Gulf of Suez, Egypt, Red Sea.

Alex Mustard / Undulated moray (Gymnothorax undulatus) moves through soft corals (Litophyton arboreum) Nuweiba, Sinai, Egypt. Gulf of Aqaba, Red Sea.

Jeff Rotman / Undulated Moray Eel (Gymnothorax undulatus) hunting at night on coral reef, Red Sea

Doug Perrine / Undulated / Leopard moray eel (Gymnothorax undulatus) seizes sleeping Yellow tang (Zebrasoma flavescens) while feeding at night, Keahole, Kona, Hawaii, Central Pacific Ocean

Doug Perrine / Undulated / Leopard moray eel (Gymnothorax undulatus) swallowing Yellow tang (Zebrasoma flavescens) seized while the fish was sleeping at night, Keahole, Kona, Hawaii, Central Pacific Ocean

Doug Perrine / Undulated / Leopard moray eel (Gymnothorax undulatus) seizes sleeping Yellow tang fish (Zebrasoma flavescens) while feeding at night, Keahole, Kona, Hawaii, Central Pacific Ocean

Doug Perrine / Two Peacock groupers {Cephalopholis argus} wait for Undulated moray eel {Gymnothorax undulatus} to resume hunting, they will then feed on fish flushed out by the eel. Helengeli, Maldives

David Fleetham / Undulated moray eel (Gymnothorax undulatus) with mouth open and gullet stretched as it feeds on a surgeonfish, Hawaii.