Appearance: Named for the greenish color of their cartilage and fat, not their shells, which are brown to olive.
Size: Up to 5 feet (1.5 meters) in length and weigh up to 700 pounds (317 kilograms).
Diet: Herbivorous, primarily feeding on seagrasses and algae.
Habitat: Found in tropical and subtropical waters worldwide.
Conservation Status: Endangered.
Appearance: Characterized by their large heads and powerful jaws.
Size: Typically 2.5 to 3.5 feet (0.8 to 1.1 meters) long and weigh between 155 and 375 pounds (70 to 170 kilograms).
Diet: Omnivorous, with a preference for jellyfish, conchs, crabs, and other marine animals.
Habitat: Found in temperate and tropical regions of the Atlantic, Pacific, and Indian Oceans.
Conservation Status: Vulnerable.
Appearance: Unlike other sea turtles, they lack a hard shell and instead have a leathery, oily carapace.
Size: Can grow over 6 feet (1.8 meters) in length and weigh up to 2,000 pounds (907 kilograms).
Diet: Primarily jellyfish.
Habitat: Widely distributed, found in the open ocean and known for their extensive migratory patterns.
Conservation Status: Vulnerable.
Appearance: Recognized by their narrow, pointed beaks and beautifully patterned shells.
Size: Grow up to 3 feet (0.9 meters) in length and weigh about 100 to 150 pounds (45 to 68 kilograms).
Diet: Omnivorous, feeding mainly on sponges and other invertebrates.
Habitat: Prefer coral reefs in tropical and subtropical waters.
Conservation Status: Critically Endangered.
Appearance: The smallest of the sea turtles, with a grey-green carapace.
Size: About 2 feet (0.6 meters) in length and weigh around 100 pounds (45 kilograms).
Diet: Mainly crabs, but also fish, jellyfish, and mollusks.
Habitat: Primarily found in the Gulf of Mexico.
Conservation Status: Critically Endangered.
Appearance: Named for their olive-colored carapace.
Size: Typically 2 to 2.5 feet (0.6 to 0.75 meters) in length and weigh about 100 pounds (45 kilograms).
Diet: Omnivorous, feeding on a variety of marine life including algae, lobsters, crabs, and fish.
Habitat: Warm and tropical waters, primarily in the Pacific and Indian Oceans.
Conservation Status: Vulnerable.
Appearance: Has a flat carapace, hence the name.
Size: Approximately 3.25 feet (1 meter) in length and weigh about 200 pounds (90 kilograms).
Diet: Omnivorous, eating sea cucumbers, jellyfish, and other invertebrates.
Habitat: Coastal waters of Australia.
Conservation Status: Data Deficient, but considered to be at risk due to limited range.