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Dugongs, along with manatees, make up a group of marine mammals called sirenians or...
Walrus Rests on Ice
Walruses use sea ice as platforms on which to nurse their young and launch their...
Green Sea Turtle
A diet of algae and seagrasses gives this turtle (Chelonia mydas) greenish colored...
Smithsonian squid expert Dr. Clyde Roper collaborated with National Geographic to...