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

Pascal Kobeh / Two conger eels (Conger conger) hiding in a hole of a wreck. Vendee, France. Atlantic Ocean.

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

Aflo / Daggertooth pike conger (Muraenesox cinereus) Kushimoto, Wakayama, Japan. January.

Alex Mustard / Conger eel (Conger conger) moves across the open seabed at night. Capo Galera, Alghero, Sardinia, Italy. Mediterranean Sea.

Franco Banfi / Conger eel (Conger conger) on Teti wreck, Vis Island, Croatia, Adriatic Sea, Mediterranean

Alex Mustard / 2020VISION / Conger eel (Conger conger) sheltering within the wreck of the Fleur De Lys, Swanage, Dorset, UK, July

Bryan and Cherry Alexander / Whalebone on hut used by Admiral Peary at Fort Conger. Ellesmere Island, Nunavut, Canada, 1994.

Toby Roxburgh / Large European conger eel (Conger conger) at Brixham fish auction, Devon, England, UK, 2009.

Fred Bavendam / Barred Sand Conger (Poeciloconger fasciatus) peeking out of burrow, Ambon, Indonesia