Shane Gross / Head portrait of a Shaws seasnake (Lapemis curtus) underwater near Malapascua, Philippines.

Doug Perrine / Olive sea snake (Aipysurus laevis) and scuba diver on seamount, Kei ( or Kai ) Islands, Moluccas, eastern Indonesia, Banda Sea, Southwest Pacific Ocean.

Doug Perrine / Olive sea snake (Aipysurus laevis) on seamount, Kei Islands, Moluccas, eastern Indonesia, Banda Sea, Southwest Pacific Ocean

Juergen Freund / Olive sea snake (Aipysurus laevis) Great Barrier Reef, Queensland, Australia.

Hanne & Jens Eriksen / Sea snake {Hydrophis spindalis} swimming on sea surface, Oman

David Hall / Sea snake {Hydrophidae} Indonesia

Joel Sartore / Photo Ark / Arabian Gulf sea snake (Hydrophis lapemoides) portrait, Arabian Wildlife Centre, UAE. Captive.

Chris Mattison / Malaysian blue coral snake (Calliophis intestinalis) coiled, Bukit Larut, Malaysia. Controlled conditions.

David Fleetham / Annulated sea snake (Hydrophis cyanocinctus), Philippines.

David Fleetham / Annulated sea snake (Hydrophis cyanocinctus), Philippines.

Oscar Dewhurst / Short-toed (snake) eagle (Circaetus gallicus) in flight. Extremadura, Spain. March

Juergen Freund / Olive sea snake (Aipysurus laevis) above coral reef. Gunung Api atoll, Indonesia.