Marie Lochman / Urchin banksia (Banksia undata), Western Australian endemic plant, Alexander Morrison National Park, Western Australia.

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.

Glenn Bartley / Undulated Antpitta (Grallaria squamigera), Abra Patricia Protected Area, Peru

Glenn Bartley / Undulated Antpitta (Grallaria squamigera), Abra Patricia Protected Area, Peru

Roland Seitre / Undulated banskia (Banksia undata splendens) in flower, Banksia Farm, Mount Barker, South West Land Division, Western Australia.

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

Luiz Claudio Marigo / Undulated tinamou {Crypturellus undulatus} trying to cross flooded river, Amazonas Brazil

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

David Fleetham / Undulated moray eel (Gymnothorax undulatus), feeding on a surgeonfish, Hawaii.

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

David Fleetham / Undulated moray (Gymnothorax undulatus), Hawaii.

David Fleetham / Undulated moray (Gymnothorax undulatus), with open mouth, Hawaii.

Joel Sartore / Photo Ark / Undulated moray eel (Gymnothorax undulatus) head portrait, Sharjah Aquarium, UAE. Captive, occurs in Pacific Ocean.

Joel Sartore / Photo Ark / Undulated moray eel (Gymnothorax undulatus) portrait, Sharjah Aquarium, UAE. Captive, occurs in Pacific Ocean.

Doug Perrine / Iridescent cardinalfish (Pristiapogon kallopterus) juvenile swimming through reef with Undulated moray eel (Gymnothorax undulatus) behind, Ho'okena, South Kona, Hawaii, USA, Pacific Ocean.

Alex Mustard / Honeycomb moray (Gymnothorax favagineus) with mouth open, emerging from a coral reef, with Undulated moray eel (Gymnothorax undulatus) behind, North Male Atoll, Maldives, Indian Ocean.

David Fleetham / Undulated moray eel (Gymnothorax undulatus) foraging on reef at night, Hawaii, Pacific Ocean.

David Fleetham / Undulated moray eel (Gymnothorax meleagris) swimming along reef during the day, Hawaii, Pacific Ocean.

Bruce Thomson / Undulated tinamou (Crypturellus undulatus) walking across grassland, Pocone, Brazil.

David Fleetham / Scarlet cleaner shrimp (Lysmata amboinensis) inspects the teeth of an Undulated moray eel, (Gymnothorax undulatus), Hawaii.

David Fleetham / Undulated moray eel (Gymnothorax meleagris) It is unusual to find a moray eel out free swimming during the day. The more often hunt by night, Hawaii.