Blue green algae on the shore of Lake Sakakawea, Van Hool, ND.

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Blue green algae on the shore of Lake Sakakawea, Van Hool, ND.

Blue green algae on the shore of Lake Sakakawea near Van Hook, ND. (courtesy photo)

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Photo by: Courtesy photo | VIRIN: 200806-A-VM618-002.JPG

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