

Sea ice is frozen seawater that floats in the ocean. This photo, taken from NASA’s Gulfstream V Research Aircraft on July 21, 2022, shows Arctic sea ice in the Lincoln Sea north of Greenland.
Read MoreIn the sparsely populated Kimberley region of Western Australia, jagged landforms reach like fingers into the turquoise-blue ocean waters. Along the coastline north of Derby, they used to reach even farther. But rising sea levels submerged part of the coastal landscape, giving rise to hundreds of islands and low-lying reefs that compose the Buccaneer Archipelago.
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The Kuroshio Sea, the main tank of the Okinawa Churaumi Aquarium. Today is World Oceans Day.
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Hawksbill sea turtle (Eretmochelys imbricata), Ras Muhammad National Park, Egypt.
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Astronaut Don Pettit took this nighttime photo while the International Space Station orbited near the Andaman Sea in Southeast Asia.
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A solitary mangrove tree on the emerald tropical beach. Havelock Island (Swaraj Dweep), Andaman and Nicobar Islands, Andaman Sea, Indian Ocean.
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With the Caribbean Sea and part of the Bahama Islands chain as a backdrop, two STS-51 crewmembers, NASA astronauts James H. Newman (left), and Carl E. Walz, evaluated procedures and gear to be used on an Hubble Space Telescope (HST)-servicing mission.
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Purple sea urchin (Sphaerechinus granularis), Garajau Marine Nature Reserve, Madeira, Portugal
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