
 Seston is the organisms (bioseston) and non-living matter (abioseston or tripton) swimming or floating in a water body. Bioseston can be often regarded as plankton, although it includes nekton as well. Abioseston comprises detritus as well. == See also == ...
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http://en.wikipedia.org/wiki/Seston

Particulate matter suspended in seawater 
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https://www.encyclo.co.uk/local/20125
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