Patricio Robles Gil / Leatherback Sea Turtle (Dermochelys coriacea) female laying her eggs on the beach at night and covering the nest with sand, Pacific coast, Oaxaca, Mexico, critically endangered

Patricio Robles Gil / Leatherback Sea Turtle (Dermochelys coriacea) female laying her eggs on the beach at night and covering the nest with sand, Pacific coast, Oaxaca, Mexico

Patricio Robles Gil / Leatherback Sea Turtle (Dermochelys coriacea) female laying her eggs on the beach at night and covering the nest with sand, Pacific coast, Oaxaca, Mexico

Kim Taylor / Leatherback Turtle {Dermochelys coriacea} egg-laying female being weighed by research team, Trinidad, West Indies.

Kim Taylor / Leatherback Turtle {Dermochelys coriacea} egg-laying females approaching from the sea, Trinidad, West Indies.

Kim Taylor / Leatherback Turtle {Dermochelys coriacea} head portrait of egg-laying female, Trinidad, West Indies.

Pete Oxford / Female Leatherback turtle leaves sea to lay eggs {Dermochelys coriacea} Grand Riviere, Trinida

Pete Oxford / Leatherback turtle female laying eggs at night {Dermochelys coriacea} Matura beach, Trinidad

Doug Perrine / Leatherback turtle {Dermochelys coriacea} laying eggs in nest on beach, Trinidad, Caribbean

Doug Perrine / Egg of Leatherback turtle {Dermochelys coriacea} held in hand, showing large size. Juno beach, Florida, USA

Doug Perrine / Researcher workers measure Leatherback turtle {Dermochelys coriacea} on beach at night, turtle has come onshore to lay eggs, Mexico

Willem Kolvoort / Leatherback turtle (Dermochelys coriacea) closing her nest after laying eggs. Babunsanti Beach, Galibi, Surinam . 2003.

Willem Kolvoort / Leatherback turtle (Dermochelys coriacea) closing her nest after laying eggs. Babunsanti Beach, Galibi, Surinam. 2003.

Willem Kolvoort / Eggs of Leatherback turtle {Dermochelys coriacea} Babunsanti Beach, Galibi, Surinam. . 2003.

Willem Kolvoort / Leatherback turtle {Dermochelys coriacea} returning to sea after egg laying on Babunsanti Beach, Galibi, Surinam . 2003.

Doug Perrine / Leatherback turtle hatchling heads for the sea, Florida, USA {Dermochelys coriacea}

Pete Oxford / Leatherback turtle returning to sea after laying eggs {Dermochelys coriacea} Grand Riviere, Trinidad

Pete Oxford / Leatherback turtle on beach to lay eggs {Dermochelys coriacea} Grand Riviere, Trinidad

Pete Oxford / Researcher measures Leatherback turtle {Dermochelys coriacea} Matura beach, Trinidad

Solvin Zankl / Albino Leatherback turtle {Dermochelys coriacea} embryo died before hatching, eggshell opened by researchers, Virgin Is, Caribbean

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) nesting at night, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) on land returning to sea after nesting, Huon Gulf, Papua New Guinea

Ingo Arndt / Leatherback Sea Turtle (Dermochelys coriacea) hatchling crawling to the water, Shell Beach, Guyana

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) underwater view of swimming hatchling, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) underwater view of swimming hatchling, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) hatchling trio heading to sea, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) hatchling trio heading to sea, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) hatchling entering ocean, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) heading to sea, Huon Gulf, Papua New Guinea

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) nesting at night, Huon Gulf, Papua New Guinea

Konrad Wothe / Leatherback Sea Turtle (Dermochelys coriacea) eggs collected for captive breeding and release, World Wildlife Federation project in Irian Jaya, Indonesia

Solvin Zankl / Leatherback turtle, close up of navel {Dermochelys coriacea} captive, Virgin Is, Caribbean

Solvin Zankl / Leatherback turtle juvenile {Dermochelys coriacea} Virgin Is, Caribbean

Doug Perrine / Leatherback turtle swimming {Dermochelys coriacea} off Mexico, Pacific Ocean. Leatherback turtles can dive to a depth of 1,230m! They would win a bronze diving medal in an animal olypics competition!...

Doug Perrine / Leatherback turtle with pilot fish {Dermochelys coriacea} Azores, North Atlantic Ocean. Leatherback turtles migrate annually a distance of 12,774 miles - the longest marathon on earth! (Non-ex).

Doug Perrine / Leatherback turtle swimming with pilot fish {Dermochelys coriacea} Azores, North Atlantic Ocean (Non-ex).

TIM MARTIN / Leatherback turtle (Dermochelys coriacea) laying eggs. Pacific Coast, Costa Rica, Central America

Pete Oxford / Leatherback female digging nest {Cermochelys coriacea} Trinidad

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) on land, Huon Gulf, Papua New Guinea, critically endangered

Mike Parry / Leatherback Sea Turtle (Dermochelys coriacea) hatchling entering sea, Huon Gulf, Papua New Guinea

Pete Oxford / Leatherback turtle leaves sea to lay eggs {Dermochelys coriacea} Grand Riviere Trinida

Pete Oxford / Leatherback turtle leaves sea to lay eggs {Dermochelys coriacea} Grand Riviere Trinida