It"s ladies" night at the Great Barrier Reef: Their bright orange-pink coloration indicates these sea goldies are females. But that could change quickly: Sea goldies are protogynous hermaphrodites, meaning that when there aren"t enough fellas around, the largest females change sex to become male, turning purplish and growing even larger. All goldies are born female, but those that switch to male enjoy instantly better odds at mating time: For every male goldie there are up to 10 females.
A goldie gala
Today in History
More Desktop Wallpapers:
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Wedded Rocks, Japan
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Fall for birding
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A splash by the sea
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Happy Presidents Day
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Coming home to roost
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Brown bears in Lake Clark National Park and Preserve, Alaska
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Carlsbad Caverns National Park in New Mexico
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Headed to the High Country
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Lace up your hiking boots for Mountain Day
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Ronda, Spain
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D-Day remembered
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A prison fit for a count
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Make your way up a picturesque passageway of Chefchaouen
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Grasmere, Lake District, Cumbria, England
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The migrating monarchs of Michoacán
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Lucian Blaga National Theater, Cluj-Napoca, Romania
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National Park Service Founders Day
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Blue linckia sea stars in Papua New Guinea
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Groundhog Day
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A light on National Hispanic Heritage Month
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Cousins Day
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Mount Rainier National Park
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Jamaica celebrates its independence
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A century since Tut s tomb was discovered
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Skaftafell, Vatnajökull National Park, Iceland
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It s fair season
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Vila Franca Islet, São Miguel Island, Azores, Portugal
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Bromo Tengger Semeru National Park, East Java, Indonesia
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Keyholes to the kingdom
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Ring-tailed lemur
Bing Wallpaper Gallery

