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Fronds of Sargassum floating at the Marina Green, San Francisco Bay. |
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Fronds of Sargassum floating at Harbor Bay Island, Alameda. |
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Fronds of Sargassum attached to rip-rap (rocks) at Treasure Island, San Francsico Bay. |
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| Close-up view showing the fronds of Sargassum at Treasure Island, San Francisco Bay. |
