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Filamentous Algae

Spirogyra; Cladophora

Also known as “pond scum” or “moss,” this type of algae can form dense, hair-like mats on the water’s surface. If left untreated, the mats can cover the entire surface of the pond. There are many species of filamentous algae and often more than one species will be present at the same time in the pond.

Also known as: Scum; water net; frog spittle; moss