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Salt evaporation ponds in South San Francisco Bay
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The edge of Grand Prismatics, Yellowstone National Park, USA.
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Minerva Terrace, part of Mammoth Hot Springs, Yellowstone, Wyoming, USA.
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Yellowstone National Park: overflow from warm springs showing various colours due to algal activity and differing levels of acidity.
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Minerva Terrace, part of Mammoth Hot Springs, Yellowstone, Wyoming
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Bubble Algae, Sea Pearl or sailor s eyeball seaweed (Ventricaria ventricosa), St. John's Reef, one of the largest single-cells known it can grow to nearly 5cm in diameter, Egypt Red Sea, Indian Ocean Africa
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