Juergen Freund / Clown / Napoleon snake eel (Ophichthus bonaparti) emerging from sand, Batangas, Philippines.

David Hall / Many-eyed snake eel (Ophichthus polyophthalmus), head peering out of burrow. Pantar, Alor Archipelago, Indonesia; November, 2006.

Gary Bell/ Oceanwide / Black-finned Snake Eel (Ophichthus melanochir) buried in sand, Great Barrier Reef, Queensland, Australia

Pascal Kobeh / Black finned snake eel (Ophichthus melanochir) buried in the sand, Sulu Sea, Philippines

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.

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.

Jeff Rotman / Close-up of High-Fin Snake Eel (Ophichthus altipennis). Lembeh Strait, Sulawesi, Celebes Sea, Indonesia

Adrian Davies / European beewolf (Philanthus triangulum) taking Honey bee (Apis mellifera) prey into burrow. Surrey, England, UK. August.

Adrian Davies / European beewolf (Philanthus triangulum) with Honey bee (Apis mellifera) prey, on Gorse. Surrey, England, UK. August.

Adrian Davies / European beewolf (Philanthus triangulum) flying towards burrow in sandy soil. Surrey, England, UK. August.

Adrian Davies / European beewolf (Philanthus triangulum) emerging from burrow in sand. Surrey, England, UK. August.

Adrian Davies / European beewolf (Philanthus triangulum) on Gorse (Ulex sp). Surrey, England, UK. August.

Kim Taylor / Bee-killer Wasp (Philanthus triangulum) approaching burrow with honey bee prey. Surrey, England, UK, July.

Kim Taylor / Bee-killer wasp (Philanthus triangulum) approaching burrow with honey bee prey. Surrey, England, UK, July.

Milan Radisics / European beewolf (Philanthus triangulum) injecting bee with paralysing agent, Budapest, Hungary

Milan Radisics / European beewolf (Philanthus triangulum) flying to paralysed bee prey, Budapest, Hungary

Milan Radisics / Recently emerged European beewolf (Philanthus triangulum) in flight, Budapest, Hungary

Milan Radisics / European beewolf (Philanthus triangulum) moving sand while digging nest, Budapest, Hungary, July.

Milan Radisics / European beewolf (Philanthus triangulum) Budapest, Hungary, June