Wave your flippers in the air…

…it's World Sea Turtle Day! The gentle giant seen here was snapped mid-dive, headed to the seabed near the Great Barrier Reef in search of some tasty marine grass. The green sea turtle is among the larger of the seven sea turtle species, with some individuals reaching 5ft long and weighing 50 stone. They live throughout the world's subtropical waters and, like other sea turtles, they migrate long distances for food. Despite all that travelling, they return to hatch their eggs on the nesting beaches where they were born.
© imageBROKER/Alamy