Original: The seven living species of sea turtles are: flatback, green sea turtle, Hawksbill, Kemp's Ridley, Leatherback, Loggerhead and Olive Ridley.
Simplified: There are seven types of sea turtles: Kemp's Ridley, Flatback, Green, Olive Ridley, Loggerhead, Hawksbill and the leatherback.