STEVE ALLEN / SCIENCE PHOTO LIBRARY STEVE ALLEN / SCIENCE PHOTO LIBRARY
Male southern elephant seal (Mirounga leonina) roaring. This is the largest of the seals, with males reaching over six metres in length. It spends most of its life at sea, in the waters around the Antarctic, coming ashore to moult, mate and give birth. Photographed at Carcass Island, the Falkland Islands.
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