The Green turtle (Chelonia mydas) is the most commonly found turtle in Sri Lanka and one of the largest known sea turtles. It can be recognized from its flattened body covered by a tear shaped shell that is blackish grey in colour, a smaller head than the loggerhead turtle and a pair of large paddle like flippers. The adult turtle is relatively large weighing between 68 and 190 kg with exceptional species weighing as much as 315 kg. It gets its name from the green colour fat found in the layers under its shell. They are found mainly thriving in the tropical waters of the ocean, feeding only on marine vegetation such as algae and sea grass, returning to the shore to lay eggs.