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Why are most sea turtle species threatened or endangered?

Most sea turtle species are threatened or endangered due to being slow to mature, long-lived, and migratory. Many are captured in coastal fisheries before reaching sexual maturity. The Kemp’s ridley and hawksbill sea turtles are considered critically endangered by the International Union for Conservation of Nature and Natural Resources, whereas the olive ridley, leatherback, and loggerhead are listed as vulnerable. The green sea turtle, long considered to as an endangered species, was classified as a species of least concern in 2025.