LIONEL, TIM & ALISTAIR / SCIENCE PHOTO LIBRARY LIONEL, TIM & ALISTAIR / SCIENCE PHOTO LIBRARY
Sea turtle swimming. Turtles (order Chelonia) are aquatic reptiles that use their powerful paddle- like front limbs to propel themselves through the water. They breathe air and females must return to land to lay their eggs. There are seven species of sea turtle, all of which are endangered or critically endangered. Photographed in the South China Sea.
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