Joel Sartore / Photo Ark / Laced moray eel (Gymnothorax favagineus) head portrait, Omaha's Henry Doorly Zoo and Aquarium. Captive, occurs in Indo-West Pacific.

Joel Sartore / Photo Ark / Laced moray eel (Gymnothorax favagineus) portrait, Omaha's Henry Doorly Zoo and Aquarium. Captive, occurs in Indo-West Pacific.

Alex Mustard / Three White-eyed moray eels (Gymnothorax thyrsoideus) and Palechin moray eel (Gymnothorax herrei) with Cleaner shrimps (Decapoda) resting in a hollow log on seabed, Bitung, North Sulawesi, Indonesia,...

Tony Wu / Spotted moray eel (Gymnothorax meleagris) pair coming together within a colony of Leaf coral (Pavona decussata) to spawn, Kagoshima Prefecture, Japan, Pacific Ocean.

Tony Wu / Dragon moray eel (Enchelycore pardalis) female releasing eggs. Male had already spawned and returned to the safety of coral, Kagoshima Prefecture, Japan, 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 / Whitemouth moray eel (Gymnothorax meleagris) with mouth open, resting in rock crevice on the ocean floor, being cleaned by a Scarlet cleaner shrimp (Lysmata amboinensis), Hawaii, Pacific Ocean.

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

Lucas Bustamante / Speckled moray eel (Gymnothorax dovii) on a reef, Cousin's Rock, Galapagos National Park, Pacific Ocean.

Lucas Bustamante / Speckled moray eel (Gymnothorax dovii) resting on rocks, Darwin Island, Galapagos National Park, Pacific Ocean.

Alex Mustard / Honeycomb moray (Gymnothorax favagineus) emerging from coral reef with mouth open, North Male Atoll, Maldives, Indian 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.

Lucas Bustamante / Two Speckled moray eels (Gymnothorax dovii) feeding on a Sea turtle carcass on the seabed, Wolf Island, Galapagos Islands, Pacific Ocean.

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

Pascal Kobeh / Two Chestnut moray eels / Panamic green moray eels (Gymnothorax castaneus) emerging from their hole on the reef, Sea of Cortez, Baja California, Mexico.

Pascal Kobeh / Chestnut moray eel / Panamic green moray eel (Gymnothorax castaneus) swimming over seabed in open water with Garden eels and a diver in the background, Sea of Cortez, Baja California, Mexico.

Tony Wu / Two moray eels (Gymnothorax meleagris) fighting, Kagoshima Prefecture, Japan

David Fleetham / Fimbriated moray / Darkspotted moray (Gymnothorax fimbriatus) peering out from crevice with two Banded coral shrimp (Stenopus hispidus) close by, Philippines, 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 / Stout moray (Gymnothorax eurostus) head portrait, with mouth open showing its teeth, Hawaii, Pacific Ocean.

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

David Fleetham / Close up of the mouth of Whitemouth moray eel (Gymnothorax meleagris), showing the needle sharp teeth in the upper jaw used for holding prey, Hawaii, Pacific Ocean.

David Fleetham / Peacock grouper (Cephalopholis argus) and two Whitemouth moray eels (Gymnothorax meleagris) collaborative hunting, Hawaii, Pacific Ocean.

Doug Perrine / Hunting coalition of Blue goatfish / Yellowsaddle goatfish (Parupeneus cyclostomus), Bluefin trevally (Caranx melampygus) and Whitemouth moray eel (Gymnothorax meleagris) on a reef, Makako Bay, Kona,...

Sergio Hanquet / Two Black moray (Muraena augusti) one Brown Moray (Gymnothorax unicolor) and one Tiger moray eel (Enchelycore anatina) peering out from underwater crevice, Tenerife, Canary Islands, Atlantic Ocean.

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

Magnus Lundgren / Cleaning shrimp sitting on the snout of Leopard moray eel (Gymnothorax favagineus), Triton Bay, West Papua, Indonesia, Pacific Ocean.

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

David Fleetham / Fimbriated moray / Darkspotted moray (Gymnothorax fimbriatus) peering out from a hole in the reef, Philippines, Philippine Sea.

Tui De Roy / Fine spotted moray (Gymnothorax dovii) swimming on reef, Wolf Island, Galapagos, South America, Pacific Ocean.

David Fleetham / Two Dragon moray eels (Enchelycore pardalis) off the island of Maui, Hawaii.

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.

David Fleetham / A close-up of the mouth of a Yellowhead moray eel (Gymnothorax fimbriatus) Hawaii, USA.

David Fleetham / Honeycomb moray eel (Gymnothorax favagineus) surrounded by male and female Dancing shrimp (Rhynchocinetes uritai), Indonesia, Pacific Ocean. Nature's Best Photography International Awards 2023 - Highl...

David Fleetham / Dwarf moray eel (Gymnothorax melatremus) on reef, North Pacific, Hawaii, USA.

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.

Etienne Littlefair / Freshwater moral eel (Gymnothorax polyuranodon) actively hunting, Daintree region, north Queensland, Australia, September.

Etienne Littlefair / Freshwater moral eel (Gymnothorax polyuranodon) actively hunting, Daintree region, north Queensland, Australia, September.

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 / Whitemouth moray eel (Gymnothorax meleagris) Hawaii.

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.

Sirachai Arunrugstichai / Laced moray eels (Gymnothorax favagineus) inhabit the same crevice in the reefs, North Male Atoll, Republic of Maldives.

Doug Perrine / Whitemouth moray eel (Gymnothorax meleagris) sheltering in bleached Antler coral (Pocillopora grandis) due to marine heatwave. Kohanaiki, Kona, Hawaii, USA. December 2015.

David Fleetham / Whitemouth moray eel (Gymnothorax meleagris), Hawaii

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

Tui De Roy / Moray Eel (Gymnothorax sp) in tropical reef community, Tulamben, North coast, Bali, Indonesia. Lesser Sunda Islands.

Tui De Roy / Three moray eels (Gymnothorax) and tropical fish in mostly dead or dying coral reef following several bleaching events, Maldives