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Worldwide, six of the seven sea turtle species are classified as threatened or endangered due to human actions and lifestyles. The biggest threats include: 1  Entanglement in fishing gear. 2  Poaching and illegal trade of eggs, meat, and shells. 3  Coastal development. 4  Plastic and other marine debris. 5  Global warming.
The leatherback turtle is a species with a cosmopolitan global range. Of all the extant sea turtle species, D. coriacea has the widest distribution, reaching as far north as Alaska and Norway and as far south as Cape Agulhas in Africa and the southernmost tip of New Zealand.laws are absent from both pairs of flippers. The leatherback's flippers are the largest in proportion to its body among extant sea turtles. Leatherback's front flippers can grow up to 2.7 m (8.9 ft) in large specimens, the largest flippers (even in comparison to its body) of any sea turtle.