The document describes the green sea turtle. It notes that the green sea turtle has a brownish yellowish green shell that can reach up to 450 pounds in weight. It lives in tropical and subtropical regions around the world, including warmer areas like Florida and Mexico that it migrates to. The green sea turtle is endangered due to loss of habitat, diseases, and entanglement in fishing nets and lines. Conservation efforts aim to help the turtles by rescuing them from nets and studying diseases, while people can help by avoiding turtle nesting beaches and not using boats near where they swim.