Gary Bell/ Oceanwide / Scarlet Cleaner Shrimp (Lysmata amboinensis) cleaning Honeycomb Moray Eel (Gymnothorax favagineus), Tulamben, Bali, Indonesia

Georgette Douwma / Ribbon eel ( Rhinomuraena quaesita) Lembeh Strait, North Sulawesi, Indonesia.

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...

Wild Wonders of Europe / Lundgren / Black moray (Muraena augusti) with mouth open, Pico and Faial, Azores, Portugal, June 2009 WWE BOOK

Pascal Kobeh / Black-spotted moray (Gymnothorax isingteena) emerging from burrow in reef. Indian Ocean, Madagascar.

Pascal Kobeh / Black-spotted moray (Gymnothorax isingteena) with open mouth. Moheli, Comoros.

Gary Bell/ Oceanwide / Scarlet Cleaner Shrimp (Lysmata amboinensis) cleaning Honeycomb Moray Eel (Gymnothorax favagineus), Tulamben, Bali, Indonesia

Pascal Kobeh / Greyface or White-eyed moray eel (Gymnothorax thyrsoideus / Siderea thyrsoidea) Sulu Sea, Philippines

Pascal Kobeh / Duke Augustus moray eel (Muraena augusti) Azores, Atlantic Ocean.

Pascal Kobeh / Duke Augustus moray (Muraena augusti) Azores, Atlantic Ocean.

Pascal Kobeh / Duke Augustus morayeel (Muraena augusti) Azores, Atlantic Ocean.

Alex Mustard / Pair of a Honeycomb moray eels (Gymnothorax favagineus) on a coral reef with triggerfish schooling above. North Male Atoll, Maldives, Indian Ocean.

Alex Mustard / Shallow depth of field portrait of a White-eyed moray (Siderea thysoidea). Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Magnus Lundgren / Wild Wonders of China / Richardson's moray (Gymnothorax richardsonii) Shelter Island, Sai Kung archipelago, Hong Kong, China.

Alex Mustard / Blue ribbon eel (Rhinomuraena quaesita) male. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.

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...

Alex Mustard / Honeycomb moray (Gymnothorax favagineus) on coral reef with Triggerfish (Balistidae) schooling above. North Male Atoll, Maldives. Indian Ocean.

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.

Jordi Chias / Honeycomb moray eel (Gymnothorax favagineus) under coral, Mozambique

Jordi Chias / Laced moray (Gymnothorax favagineus), Ari atoll, Maldives islands, Indian Ocean

Jordi Chias / Laced moray (Gymnothorax favagineus), Ari atoll, Maldives islands, Indian Ocean.

Georgette Douwma / Two Greyface moray eels (Gymnothorax thyrosoideus) Ambon, Indonesia.

Georgette Douwma / Three Greyface moray eels (Gymnothorax thyrosoideus) Ambon, Indonesia.

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

Alex Mustard / Latticetail moray (Gymnothorax buroensis) emerging from soft coral on a reef. Sangeang Island, Sumbawa, Indonesia. Flores Sea.

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

Franco Banfi / Fine spotted moray (Gymnothorax dovi) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Fine spotted moray (Gymnothorax dovii) Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Fine spotted moray eels (Gymnothorax dovi) together in den, Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Fine spotted moray eel (Gymnothorax dovii) together in a den, Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

Franco Banfi / Fine spotted moray eel (Gymnothorax dovii) together in a den, Malpelo Island National Park, UNESCO World Heritage Site, Colombia, East Pacific Ocean

SCOTLAND: The Big Picture / Becky Priestley, Wildlife Officer with Trees for Life, carrying out health checks on Red squirrels (Sciurus vulgaris) trapped as part of reintroduction to the north west Highlands, Moray, Scotland, UK...

SCOTLAND: The Big Picture / Becky Priestley, Wildlife Officer with Trees for Life, carrying out health checks on Red squirrels (Sciurus vulgaris) trapped as part of reintroduction to the north west Highlands, Moray, Scotland, UK...

Peter Cairns / Becky Priestley, Wildlife Officer with Trees for Life, with Red squirrel (Sciurus vulgaris) caught in cage trap as part of reintroduction to the north west Highlands, Moray, Scotland, UK. Winner of th...

Peter Cairns / Becky Priestley, Wildlife Officer with Trees for Life, preparing cage trap to catch Red squirrels (Sciurus vulgaris) as part of reintroduction to the north west Highlands, Moray, Scotland, UK. Winner...

Constantinos Petrinos / Blue ribbon eel (Rhinomuraena quaesita) adult male, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Blue ribbon eel (Rhinomuraena quaesita) adult male, Lembeh Strait, North Sulawesi, Indonesia.

Franco Banfi / Scuba diver with honeycomb moray eel (Gymnothorax favagineus) at burrow, Aldabra Atoll, Natural World Heritage Site, Seychelles, Indian Ocean.

SCOTLAND: The Big Picture / Becky Priestley, Wildlife Officer with Trees for Life, preparing cage trap to catch red squirrels as part of their reintroduction to the north west Highlands, Moray, Scotland, UK.

SCOTLAND: The Big Picture / Collecting eggs from wild caught Atlantic Salmon (Salmo salar) female to spawn fry in controlled conditions, Sandbank hatchery, Glenlivet, Moray, Scotland, UK, November.

SCOTLAND: The Big Picture / Atlantic salmon (Salmo salar) eggs after collecting from an adult female fish, Sandbank hatchery, Glenlivet, Moray, Scotland, UK, November.

SCOTLAND: The Big Picture / Atlantic salmon (Salmo salar) eggs after collecting from an adult female fish, Sandbank hatchery, Glenlivet, Moray, Scotland, UK, November.

SCOTLAND: The Big Picture / Atlantic salmon (Salmo salar) eggs after collecting from an adult female fish, Sandbank hatchery, Glenlivet, Moray, Scotland, UK, November.

SCOTLAND: The Big Picture / Pouring freshly fertilised Atlantic Salmon (Salmo salar) eggs into a rotating vat, Sandbank hatchery, Glenlivet, Moray, Scotland, UK, November.

SCOTLAND: The Big Picture / Collecting eggs from wild caught Atlantic Salmon (Salmo salar) female to spawn fry in controlled conditions, Sandbank hatchery, Glenlivet, Moray, Scotland, UK, November.

SCOTLAND: The Big Picture / Collecting eggs from a wild caught Atlantic Salmon (Salmo salar) to spawn fry in controlled conditions, Sandbanks Hatchery, Glenlivet, Moray, Scotland, UK, November 2015.

SCOTLAND: The Big Picture / Biologist washing freshly fertilised Atlantic salmon (Salmo salar) eggs, an important part of the process preventing them from getting smothered, Sandbank Hatchery, Glenlivet, Moray, Scotland, Novembe...

SCOTLAND: The Big Picture / Sandbank Hatchery manager tending to Atlantic salmon (Salmo salar) eggs in large rotating vats, Glenlivet, Moray, Scotland, UK, November 2015.

SCOTLAND: The Big Picture / Spey Fishery Board biologist measuring Atlantic salmon (Salmo salar), Glenlivet, Moray, Scotland, UK, November 2015.

Tony Wu / Kidako moray eel (Gymnothorax kidako) on the prowl, a common species in waters around Izu Peninsula, Japan.

Tony Wu / Small moray eel (Gymnothorax sp) covered with parasites, hiding in a bottle in the muck of Lembeh Strait, North Sulawesi, Indonesia

Tony Wu / Fimbriated moray eel (Gymnothorax fimbriatus) curled up in discarded paint can in the muck of Lembeh Strait, North Sulawesi, Indonesia.

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 / Spotted garden eel (Heteroconger hassi) half out of burrow in seabed Restorf Island, Kimbe Bay, Papua New Guinea

Tony Wu / Spotted garden eel (Heteroconger hassi) half out of burrow in seabed, Restorf Island, Kimbe Bay, Papua New Guinea

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

Tony Wu / Snowflake moray eel (Echidna nebulosa) and Barredfin moray eel (Gymnothorax zonipectis) sharing a burrow, Ambon, Indonesia

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

Franco Banfi / Panamic green moray (Gymnothorax castaneus) and Whitetip reef sharks (Triaenodon obesus) Roca Partida close to San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Weste...

Franco Banfi / Panamic green moray (Gymnothorax castaneus) Roca Partida close to San Benedicto island, Revillagigedo Archipelago Biosphere Reserve, Socorro Islands, Pacific Ocean, Western Mexico .

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.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) cleaned by Common cleanerfish (Labroides dimidiatus) Maldives. Indian Ocean.

Jeff Rotman / Whitespotted moray eel (Gymnothorax punctatus) in eel grass, Red Sea.

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.

Franco Banfi / Brown moray eel (Gymnothorax unicolor) coming out of hole and Ornate wrasse fish (Thalassoma pavo), Santa Maria Island, Azores, Portugal, Atlantic Ocean

Pascal Kobeh / Ribbon eel (Rhinomuraena quaesita) female in burrow, Maldives, Indian Ocean.

Aflo / Ribbon eel (Rhinomuraena quaesita) looking out of burrow with mouth open, Kuroshima, Okinawa, Japan. July.

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 black-spotted / spotted moray (Gymnothorax isingteena), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Close-up of the head of a Honeycomb moray (Gymnothorax favagineus), coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) with a wounded jaw, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) with a wounded jaw, coast of Dhofar and Hallaniyat islands, Oman. Arabian Sea.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) in a crack of the reef covered with soft corals (Dendronephthya ) with Ring-tailed cardinalfish (Ostorhinchus aureus), coast of Dhofar and Hallaniyat islands,...

Pascal Kobeh / Black spotted moray (Gymnothorax isingteena) near its hole in a crack of the reef with Short-tooth / Goldbelly cardinalfish (Ostorhinchus apogonoides) and Five-lined cardinalfish (Cheilodipterus quin...

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) out of its burrow / its hole close to a brain coral (Platygyra lamellina) with another one behind it, Daymaniyat islands, Oman. Gulf of Oman.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) with sea urchins spines on its head among mushroom leather coral (Sarcophyton ), Daymaniyat islands, Oman. Gulf of Oman.

Pascal Kobeh / Diver with a honeycomb moray (Gymnothorax favagineus) out of its hole, Daymaniyat islands, Oman. Gulf of Oman. October 2010.

Pascal Kobeh / Honeycomb moray (Gymnothorax favagineus) out of its hole with golden cardinalfish / ring-tailed cardinalfish (Apogon aureus), Daymaniyat islands, Oman. Gulf of Oman.