Franco Banfi / Green moray (Gymnothorax funebris) Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean

Alex Mustard / Group of predators hunting together, in an example of 'Nuclear foraging'. The Moray eel (Gymnothorax javanicus) flushes out prey, and is followed by a Napolean wrasse (Cheilinus undulatus) and a Bluef...

Alex Mustard / Three moray eels, a Honeycomb moray: (Gymnothorax favagineus), Yellowmargin moray: (Gymnothorax flavimarginatus) and White-eyed moray (Gymnothorax thrysoideus) emerge from a single hole in a coral ree...

David Fleetham / Yellowmargin moray eel (Gymnothorax flavimarginatus) with a Banded coral shrimp (Stenopus hispidus) inspecting it for parasites, 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 / Bluefin trevally (Caranx melampygus) mixed-species foraging and hunting behaviour, with Giant moray (Gymnothorax javanicus). Shark Reef to Jolande, Ras Mohammed National Park, Egypt, Red Sea.

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.

Linda Pitkin / Green moray (Gymnothorax funebris) Klein Bonaire, Bonaire, Leeward Antilles, Caribbean.

Linda Pitkin / Spotted moray (Gymnothorax moringa) Bonaire, Leeward Antilles, Caribbean.

Linda Pitkin / Spotted moray (Gymnothorax moringa) Bonaire, Leeward Antilles, Caribbean.

Georgette Douwma / Yellowmouth mora yreel (Gymnothorax nudivomer). Egypt, Red Sea.

Georgette Douwma / Giant moray eel (Gymnothorax javanicus). Ambon, Indonesia.

Georgette Douwma / Giant moray eel (Gymnothorax javaniucus) hunting over coral reef, Red Sea, Egypt. January.

Franco Banfi / Yellowmargin moray (Gymnothorax flavimarginatus) peering out of hole, Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Bertie Gregory / Giant moray eel (Gymnothorax javanicus) opening its mouth to breathe, at night on the barge wreck, Gubal Island, northern Red Sea.

Bertie Gregory / Pair of giant moray eels (Gymnothorax javanicus) in a cave, Gubal Island, northern Red Sea.

Bertie Gregory / Giant moray eel (Gymnothorax javanicus) opening its mouth to breathe, at night on the barge wreck, Gubal Island, northern Red Sea.

Tony Wu / Giant moray eel (Gymnothorax javanicus) being cleaned by Scarlet cleaner shrimp (Lysmata amboinensis) Ambon, Indonesia

Tony Wu / Giant moray eel (Gymnothorax javanicus) being cleaned by Scarlet cleaner shrimp (Lysmata amboinensis) Ambon, Indonesia

Pascal Kobeh / Green moray (Gymnothorax funebris) out of its hole or burrow, Belize, Caribbean

Pete Oxford / Green moray (Gymnothorax funebris) Hol Chan Marine Reserve, Ambergris Caye, Belize.

Pete Oxford / Green moray eel (Gymnothorax funebris) Lighthouse Reef Atoll, Belize.

Franco Banfi / Green moray (Gymnothorax funebris) Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean

Franco Banfi / Green moray (Gymnothorax funebris) Isla de la Juventud, Cuba, Caribbean Sea, Atlantic Ocean

Claudio Contreras / Spotted moray (Gymnothorax moringa) on seabed, Playa del Carmen, Caribbean Sea, Mexico, January

Georgette Douwma / Giant moray (Gymnothorax javanicus) with Red soldierfish (Myripristes berndti) shoal, Egypt, Red Sea.

Georgette Douwma / Giant moray (Gymnothorax javanicus) two in hole, Egypt, Red Sea.

Pascal Kobeh / Two Giant morays (Gymnothorax javanicus) coming out of their burrows on coral reef, with Oriental sweetlips (Plectorhinchus orientalis) on background, Maldives. Indian Ocean.

Pascal Kobeh / Two Giant morays (Gymnothorax javanicus) coming out of their burrows on coral reef, with Oriental sweetlips (Plectorhinchus orientalis) on background, Maldives. Indian Ocean.

Pascal Kobeh / Two Bluestreak cleaner wrasses (Labroides dimidiatus) one a juvenile, cleaning a Giant moray (Gymnothorax javanicus) Maldives. Indian Ocean.

Pascal Kobeh / Bluestreak cleaner wrasses (Labroides dimidiatus) cleaning a Giant moray (Gymnothorax javanicus) Maldives. Indian Ocean.

Pascal Kobeh / Two Bluestreak cleaner wrasses (Labroides dimidiatus) one a juvenile, cleaning a Giant moray (Gymnothorax javanicus) Maldives. Indian Ocean.

Pascal Kobeh / Bruun's cleaner shrimps (Urocaridella antonbrunii) cleaning a giant moray (Gymnothorax javanicus) Maldives. Indian Ocean.

Pascal Kobeh / Close-up of the head of a Yellowmouth / Starry moray (Gymnothorax nudivomer) with mouth open, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Close-up of the head of a Yellowmouth / Starry moray (Gymnothorax nudivomer) with mouth open, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Close-up of the head of a Yellowmouth / Starry moray (Gymnothorax nudivomer) with mouth open, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Yellowmouth / Starry moray (Gymnothorax nudivomer) coming out of its hole in a hard coral reef (Porites), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Michael Pitts / Giant moray eel (Gymnothorax javanicus) being attended to by a Bluestreak cleaner wrasse (Labroides dimidiatus), Maldives, Indian Ocean.

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

Alex Mustard / Giant moray eel (Gymnothorax javanicus) under boat and on barge wreck, Gubal Island, Red Sea. Egypt.

Alex Mustard / Giant moray (Gymnothorax javanicus) emerges from crack in coral reef and is cleaned by cleaner wrasse (Labroides dimidiatus) Ras Mohammed Marine Park, Sinai, Egypt. Red Sea.

Michael Pitts / Yellow-margined moray (Gymothorax flavimarginatus) with accompaning cleaner shrimp. Maldives.

Franco Banfi / Yellowmargin moray (Gymnothorax flavimarginatus) Waigeo island, Raja Ampat, Irian Jaya, West Papua, Indonesia, Pacific Ocean

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.

Sergio Hanquet / Yellowmargin moray (Gymnothorax flavimarginatus) resting on coral reef, Maldives, Indian Ocean.

Sergio Hanquet / RF - Yellowmargin moray (Gymnothorax flavimarginatus) with mouth open displaying aggression, Maldives, Indian Ocean. (This image may be licensed either as rights managed or royalty free.)

David Fleetham / Two Scarlet cleaner shrimps (Lysmata amboinensis) inspecting a Yellowmargin moray eel (Gymnothorax flavimarginatus) off Sabang Beach, Mindoro, Philippines, Pacific Ocean.

Alex Mustard / Yellowmargin moray (Gymnothorax flavimarginatus) peering out from Digitate leather coral (Sinularia sp.) on a reef, Ari Atoll, Maldives, Indian 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 / Yellowmargin moray eel (Gymnothorax flavimarginatus) sheltering in a crevice among Slate pencil sea urchins (Heterocentrotus mammillatus), Hawaii, Pacific Ocean.

David Fleetham / Yellowmargin moray eel (Gymnothorax flavimarginatus), surveying the surrounding reef, Hawaii, Pacific Ocean.

David Fleetham / Yellowmargin moray eel (Gymnothorax flavimarginatus) sheltering in a crevice behind a Slate pencil sea urchin (Heterocentrotus mammillatus), Hawaii, Pacific Ocean.

David Fleetham / Giant moray eel (Gymnothorax javanicus) hiding in coral reef rocks, Hawaii.

Alex Mustard / Yellowmouth moray (Gymnothorax nudivomer) on a coral reef, Jordan. Gulf of Aqaba, Red Sea.

Pascal Kobeh / Two Honeycomb morays (Gymnothorax favagineus) and a Giant moray (Gymnothorax javanicus) emerging from their burrow, Indian Ocean, Maldives.

Pascal Kobeh / Giant moray (Gymnothorax javanicus) emerging from its burrow, Red Sea, Egypt.

Pascal Kobeh / Two Giant moray eels (Gymnothorax javanicus) emerging from their burrow, Red Sea, Egypt.

Pascal Kobeh / Two Honeycomb morays (Gymnothorax favagineus) and a Giant moray (Gymnothorax javanicus) emerging from their shared burrow, Indian Ocean, Maldives.

Pascal Kobeh / Green moray (Gymnothorax funebris) emerging from its burrow with cleaner wrasse, The Gardens of the Queen, Cuba, Caribbean Sea.

David Fleetham / Giant moray eel (Gymnothorax javanicus) with mouth open in aggressive display, Fiji.

David Fleetham / Yellow margin moray eel (Gymnothorax flavimarginatus) with two Blue goatfish (Parupeneus cyclostomus), a Bluefin trevally (Caranx melampygus) and a Peacock grouper (Cephalopholis argus) hunting co-ope...

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

Magnus Lundgren / Wild Wonders of China / Yellow-edged moray (Gymnothorax flavimarginatus) Green Island, Taiwan.

Claudio Contreras / Spotted moray (Gymnothorax moringa), Cozumel Island, Caribbean Sea, Mexico.

Shane Gross / Green moray eel (Gymnothorax funebris) hiding under coral in The Bahamas.