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Found while fishing a lake in NW CO. reeled it in
A: That is a Nostoc ball. The person who said bubble algae had the right idea, although that term is mostly used to refer to a marine alga, Valonia, which is unrelated. This is a mass of Cyanobacteria (formerly called blue green algae), held together by mucilage. It is mostly harmless, but do not eat.
