MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY MATTHEW OLDFIELD / SCIENCE PHOTO LIBRARY
Turtle swimming. Unidentified turtle (order Testudines) swimming in silhouette. Turtles use their powerful paddle-like front limbs to propel themselves through the water. Turtles are aquatic reptiles and spend nearly their whole lives at sea. Photographed off Palau Sipadan, Malaysia.
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