It is one of the most widely distributed sea turtles on Earth and among the most iconic marine reptiles inhabiting tropical and subtropical oceans. Chelonia mydas possesses a streamlined body ideally adapted for life at sea, with a relatively smooth, oval-shaped carapace that can exceed one meter in length in large adults. Its coloration varies considerably, typically displaying combinations of green, olive, brown, yellowish, and dark markings that provide effective camouflage in marine environments. The head is relatively small compared to other sea turtle species and bears a single pair of prefrontal scales, an important identification feature. Its limbs are modified into powerful flippers that enable efficient long-distance swimming. The common name "Green Turtle" originates from the greenish color of its body fat, which is associated with its largely plant-based diet as an adult.
Geographic Distribution: It occurs throughout tropical and subtropical waters of the Atlantic, Pacific, and Indian Oceans. Its range includes coastal regions and islands across the Americas, Africa, southern Europe, Asia, and Oceania. Populations undertake extensive migrations between feeding grounds and nesting beaches, often traveling thousands of kilometers. In the Americas, it is found from temperate coastal zones to equatorial waters. Population connectivity is influenced by ocean currents, habitat availability, and reproductive behavior, creating complex migration networks across entire ocean basins.
Habitat: It primarily inhabits shallow coastal waters, coral reefs, seagrass meadows, protected bays, estuaries, and coastal lagoons. Young juveniles spend several years in pelagic oceanic habitats before recruiting to coastal environments where much of their growth occurs. Adults show a strong association with productive seagrass beds and algal communities that provide abundant food resources. During the breeding season, females return to sandy beaches, often near their natal regions, to lay eggs.
Diet: The diet changes substantially throughout its life cycle. Juveniles are generally more omnivorous, consuming small invertebrates, jellyfish, and various marine organisms alongside plant material. As they mature, they become predominantly herbivorous, feeding mainly on seagrasses and marine algae. This feeding behavior plays an important ecological role by maintaining healthy seagrass ecosystems and promoting new plant growth through grazing. Small invertebrates attached to vegetation may occasionally be consumed incidentally.
Behavior: This species is generally solitary, although individuals may gather in highly productive feeding areas. It possesses remarkable navigational abilities that allow it to locate feeding grounds and nesting beaches separated by vast oceanic distances. Green turtles perform extended dives while feeding or resting and can remain underwater for long periods due to specialized physiological adaptations. Although they spend nearly their entire lives at sea, females come ashore during nesting seasons to deposit eggs. Individuals often demonstrate strong fidelity to specific feeding and reproductive areas over many years.
Reproduction: Sexual maturity may require several decades depending on environmental conditions and population characteristics. Mature adults migrate to traditional breeding grounds where mating usually occurs in nearshore waters. At night, females emerge onto sandy beaches and excavate nesting chambers in which they deposit clutches that may exceed one hundred eggs. After covering the nest, the female returns to the ocean without providing parental care. Incubation depends on environmental conditions, and nest temperature influences the sex of developing hatchlings. Upon emergence, hatchlings rapidly crawl toward the sea, facing intense predation and numerous environmental challenges during their early life stages.
Conservation Status: Globally, it is classified as Endangered (EN). While certain populations have shown encouraging recoveries due to conservation efforts, the species remains threatened by numerous human-related pressures. Major threats include incidental capture in fisheries, degradation of nesting beaches, marine pollution, plastic ingestion, coastal development, illegal harvest, and climate change. The protection of feeding habitats, migratory corridors, and nesting beaches remains essential for the long-term survival of this species.
Author of this compilation: EcoRegistros – 22/06/2026