David Hall / Crocodile snake eel (Brachysomophis henshawi), head sticking out of gravel. Pantar, Alor Archipelago, Indonesia.

David Hall / Crocodile snake eel (Brachysomophis henshawi) peering out of burrow. Pantar, Alor Archipelago, Indonesia.

Franco Banfi / Crocodile snake eel (Brachysomophis crocodilinus) hiding in sand, Pura Vida House Reef, Dumaguete, East Negros Island, Central Visayas, Philippines, Pacific Ocean.

Chris Newbert / Reptilian Snake Eel (Brachysomophis henshawi) emerging from burrow, Indonesia

Pete Oxford / Reptilian Snake Eel (Brachysomophis henshawi), Banda Sea, Indonesia

David Fleetham / Reptilian snake eel (Brachysomophis henshawi) half buried in sand, hiding, Hawaii.