Sea turtles can be cooked by players who have level 82 Cooking or higher. Sea turtles heal 21 hitpoints in one serving. With a Cooking level of 99 and cooking gauntlets, players still burn roughly one out of every four sea turtles. Using the Cooking cape will allow players to stop burning sea turtles.
Sea turtles can be difficult to sell because sharks are more easily obtained and cheaper.