How can we call the layer of algae seen on the surface of water?

1.	How can we call the layer of algae seen on the surface of water?
Answer» EXPLANATION: pond scum N. Any of various freshwater algae that form a usually greenish film on the surface of stagnant WATER

Answer»

pond scum N. Any of various freshwater algae that form a usually greenish film on the surface of stagnant WATER

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