Cheloniidae is a family of typically large marine turtles that are characterised by their common traits such as, having a flat streamlined wide and rounded shell and almost paddle-like flippers for their forelimbs.

Ch­e­loni­ids are large tur­tles, rang­ing be­tween 71 cm (Lep­i­dochelys oli­vacea) and 213 cm (Caretta caretta) in max­i­mum cara­pace length. The shell is oval or heart-shaped. The limbs are mod­i­fied into flip­pers for swim­ming and can­not sup­port the weight of the tur­tle on land.

Cheloniidae (green turtles, flatback sea turtles, loggerhead sea turtles, hawksbills, and ridleys). Both families are highly aquatic, and most species only appear on coastal beaches for egg laying; however, the green turtle ( Chelonia mydas ) occasionally basks in terrestrial environments.

Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, [3] are reptiles of the order Testudines and of the suborder Cryptodira.

Cheloniidae is a family of large marine turtles that have a flat, streamlined, wide, and rounded shell, and almost paddle-like flippers for forelimbs. They comprise six species: the green, loggerhead, olive ridley, hawksbill, flatback, and Kemp's ridley sea turtles.

Working with others to conserve, protect and enhance fish, wildlife, plants and their habitats for the continuing benefit of the American people.

Cheloniidae is a family that contains all but one of the marine turtles. The only turtle that isn’t part of Cheloniidae is the leatherback sea turtle. Common characteristics of the chelonians within this family include rounded wide streamlined shells, flattened carapaces, and paddle-like flippers.

The Cheloniidae are most closely related to the leatherback turtles of the family Dermochelyidae. Fossils are known from as early as the Cretaceous period. Because of uncertainty about the phylogenetic relationships among the five living genera, no subfamilies are currently recognized.

2018年6月8日 · Cheloniidae (marine turtles; order Chelonia, suborder Cryptodira) A family of turtles in which the shell consists of a carapace which is flat and streamlined, and a plastron which is reduced. The fore limbs are broad and flat, with one or two claws. The hind limbs are flattened and rudder-like.

Seaturtles inhabit all the oceans of the world and the Mediterranean Sea. These turtles live in saltwater from the tropics to areas with mild climates well north and south of the equator, the imaginary circle around Earth that is midway between the poles.