This blue shark is swimming near the Azores, a Portuguese chain of islands about 850 miles west of mainland Portugal. The inspiration for the shark"s name comes from its back color, which can vary from a light blue to a darker shade. Its slender, tapered body is propelled through the water with agility and grace by a long tail fin that sweeps from side to side. Listed as "near threatened," blue sharks are found off the coast of every continent except for Antarctica, making them the most widely distributed of all sharks. Swift and powerful swimmers, blue sharks migrate long distances. It"s common for them to swim 1,200 to 1,700 miles or even farther, following the clockwise currents of the Gulf Stream in search of food, mates, and "just right" water temperatures.
Explorer of the sea
Today in History
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Fish River Canyon, Namibia
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International Day of the Tropics
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Vacuum Chamber 5 at Glenn Research Center
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Sutherland Falls in Fiordland National Park
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Look to the north sky tonight for the Perseids
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Ancient town of Sorano, Tuscany, Italy
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Wildflower bloom, Central Valley, California
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Autumn comes to Old Town
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My my, it s Syttende Mai
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National Hummingbird Day
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Bow Bridge in Central Park, New York City
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A circular celebration
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Sedona, Arizona
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Fall colors below Mount Sneffels near Ridgway, Colorado
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Starling murmuration over the ruins of Brightons West Pier, England
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Sibiu Christmas market, Romania
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Gentoo penguins in Antarctica
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The Battle of the Bulge 75 years later
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Playa del Silencio, Spain
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A viewer with a view
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National Park Week: Haleakalā National Park, Hawaii
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What kind of bird laid these eggs?
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Wallabies at sunrise, Australia
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An ice cap-puccino
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Penguin Awareness Day
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On the rebirth of the Olympic Games
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National Lighthouse Day
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National Trails Day
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Native American Heritage Month
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Castle on a hill
Bing Wallpaper Gallery

