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Size of leatherback compared to human. Leatherback turtles have the most hydrodynamic body of any sea turtle, with a large, teardrop-shaped body. A large pair of front flippers powers the turtles through the water. Like other sea turtles, the leatherback has flattened forelimbs adapted for swimming in the open ocean.
It tends to weight slightly more average weight than the green sea turtle, and reaches more massive top sizes. The Loggerhead sea turtle ( Caretta caretta ) reaches a maximum size of 2.1 m (7 ft) and weight of 545 kg (1,202 lb), while the Green sea turtle ( Chelonia mydas ) reaches a maximum weight in the range of 395 to 500 kg (871 to 1,102 lb ...
Archelon is an extinct marine turtle from the Late Cretaceous, and is the largest turtle ever to have been documented, with the biggest specimen measuring 4.6 m (15 ft) from head to tail and 2.2–3.2 t (2.4–3.5 short tons) in body mass.
Sea turtles can be found in all oceans except for the polar regions. The flatback sea turtle is found solely on the northern coast of Australia. The Kemp's ridley sea turtle is found solely in the Gulf of Mexico and along the East Coast of the United States. [30] Sea turtles are generally found in the waters over continental shelves.
The loggerhead sea turtle ... [18] [19] Adults have an approximate weight range of 80 to 200 kg (180 to 440 ... Loggerheads have an average clutch size of 112.4 eggs ...
However, the size is variable across the islands and subspecies; those from Pinzón Island are relatively small with a maximum known weight of 76 kg (168 lb) and carapace length of approximately 61 cm (24 in) compared to 75 to 150 cm (30 to 59 in) range in tortoises from Santa Cruz Island. [90]
The largest known turtle was Archelon ischyros, a Late Cretaceous sea turtle up to 4.5 m (15 ft) long, 5.25 m (17 ft) wide between the tips of the front flippers, and estimated to have weighed over 2,200 kg (4,900 lb). [10]
Sizes among the seven species of sea turtles range from 71 to 213 cm; [2] for example, the smallest turtle species in the family Cheloniidae, the Kemp's Ridley, only has a shell size of about 75 cm and a weight of 50 kg. All species have a distinct hardened shell.