Pleuston
[ploo-stuh n, -ston] /ˈplu stən, -stɒn/
noun, Biology.
1.
a buoyant mat of weeds, algae, and associated organisms that floats on or near the surface of a lake, river, or other body of fresh water.
/ˈpluːstən; -stɒn/
noun
1.
a mass of small organisms, esp algae, floating at the surface of shallow pools
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