Leatherback Sea Turtle
The largest living sea turtle (and the largest living of all turtles), the leatherback is so named because of its thick, leathery shell, as opposed to the harder shell found on most other turtles.
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Family: Dermochelyidae
Genus: Dermochelys
Species: D. coriacea
Common Names: Leatherback Sea Turtle, Lute Turtle, Leathery Turtle, Luth
The body shape of the leatherback is designed to help it travel faster through its ocean habitat. They are found throughout most of the world’s oceans, with the widest range of any sea turtle. They are found in tropical warm waters, as well as cold waters within the Arctic Circle.
The leatherback’s diet consists mainly of jellyfish, though they may sometimes eat other soft animals, like cephalopods (squids and octopuses).
Like other sea turtles, leatherbacks lay their eggs on land. Females will find a beach, usually near where they were originally hatched themselves, and venture on to land at night when there is less chance of overheating or being attacked by a predator.
The mother turtle will use her flippers to dig out a nest in the soft sand, and lay around 100 eggs. Once they hatch about two months later, the hatchlings will wait until nighttime and dig their way out of the sandy nest and head towards the ocean. Once they make it to the sea, male turtles will never again set flipper on land. Females will only venture back onto land to lay their own eggs.
The leatherback sea turtle is the largest living member of the order Testudines (turtles), and the heaviest reptile outside of crocodilians. Its shell can measure nearly 7 feet in length, and it can weigh well over 1,500pounds.
The leatherback is unique among other sea turtles, because its tear-drop shaped shell is covered in leathery skin and tiny osteoderms (small bony structures). Most turtles have a fully hard carapace made of bone. The skin of the leatherback is thick and rubbery, unlike the scaly skin of most sea turtles.
Like other turtles, leatherbacks lack teeth, but their beaks have teeth-like points, and their throats are lined with spines that help them swallow food.
Leatherbacks are dark gray to black in color above, and lighter below.
The leatherback is culturally significant to many tribes around the world, including the Seri people of Mexico, who believe it to be one of their five creators of their tribe. The turtle is the state animal of Terengganu in Malaysia, and has great significance to the Maori people of New Zealand, and the Polynesian people at large.
While a fully grown leatherback has little to fear from other animals, younger turtles can easily fall victim to sea birds and other oceangoing predators. But their biggest threats are largely man-made. In particular, theturtles often mistake discarded plastic bags for their main food source – the jellyfish– and this plastic can cause serious harm once ingested by the turtle.
Other threats include egg harvesting, and light pollution on beaches that causes nesting turtles and hatchlings to become confused. Vessel strikes are also a cause of concern.
The leatherback is considered Vulnerable by the IUCN (International Union for Conservation of Nature).
References:
https://en.wikipedia.org/wiki/Leatherback_sea_turtle
https://www.fisheries.noaa.gov/species/leatherback-turtle
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