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Atlantic subpopulation[edit]

The green sea turtle can generally be found throughout the Atlantic Ocean. Individuals have been spotted as far north as Canada in the western Atlantic, and the British Isles in the east. The subpopulation's southern range is known until past the southern tip of Africa in the east and Argentina in the western Atlantic. The major nesting sites can be found on various islands in the Caribbean, along the eastern shores of the continental United States, the eastern coast of the South American continent and most notably, on isolated North Atlantic islands.

In the Caribbean, major nesting sites have been identified on Aves Island, the U.S. Virgin Islands, Puerto Rico, and Costa Rica. In recent years there are signs of increased nesting in the Cayman Islands.^[25] One of the region's most important nesting grounds is in Tortuguero in Costa Rica.^[26] In fact, the majority of the Caribbean region's C. mydas population hails from a few beaches in Tortuguero.^[27] Within United States waters, minor nesting sites have been noted in the states of Georgia, North Carolina, South Carolina, and all along the east coast of Florida. Hutchinson Island in particular is a major nesting area in Florida waters. Notable locations in South America include secluded beaches in Suriname and French Guiana.^[28] In the Southern Atlantic Ocean, the most notable nesting grounds for Chelonia mydas are found on the island ofAscension,^[19] hosts 6,000–13,000 turtle nests.^[29][30][31]

In contrast with the sporadic distribution of nesting sites, feeding grounds are much more widely distributed throughout the region. Important feeding grounds in Florida include Indian River Lagoon, the Florida Keys,Florida Bay, Homosassa, Crystal River, and Cedar Key.^[19][32]