Alex Mustard / Portrait of a Clown snake eel (Ophichthus bonaparti) emerging from the seabed. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.

Alex Mustard / Portrait of a Clown snake eel (Ophichthus bonaparti) emerging from the seabed. Ambon Bay, Ambon, Maluku Archipelago, Indonesia. Banda Sea, tropical west Pacific Ocean.

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

Constantinos Petrinos / Stargazer snake eel (Brachysomophis cirrocheilos) at burrow, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Stargazer snake eel (Brachysomophis cirrocheilos) at burrow with mouth open, Lembeh Strait, North Sulawesi, Indonesia.

Constantinos Petrinos / Blackfin snake eel (Ophichthus altipennis) emerging from burrow, Lembeh Strait, North Sulawesi, Indonesia.

Georgette Douwma / Napoleon snake eel (Ophichthus bonaparte) swimming over sand. Lembeh Strait, North Sulawesi, Indonesia.

Pascal Kobeh / Bonapart's / Napoleon snake eel (Ophichthus bonaparti) head sticking out of sand, Sulu Sea, Philippines

Pascal Kobeh / Bonapart's / Napoleon snake eels (Ophichthus bonaparti) heads above sea floor, Sula Sea, Philippines

Georgette Douwma / Napoleon snake eel (Ophychthus bonaparti) out of its burrow, swimming over sandy bottom. Lembeh Strait, North Sulawesi, Indonesia.

Alex Mustard / Marbled snake eel (Callechelys marmoratus) thrusts its head out of sand, stiring up the sediment. Nuweiba, Sinai, Egypt. Gulf of Aqaba, Red Sea.

Alex Mustard / Banded snake eel (Myrichthys colubrinus) swimming across the seabed, North Sulawesi, Indonesia, Lembeh Strait.