GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Green sea turtle (Chelonia mydas). This turtle can grow to over a metre in length and weigh around 200 kg. It is the largest of all turtles and it feeds mainly on algae. This species is under threat of extinction due to being used as a meat source and being affected by marine pollution. Photographed in Malaysia.
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