Gee I don't know, what do you think has happened when bays, lagoons, aquatic environments stop thriving after a number of years?
So if we suck all sand off the bottom of the ocean, all eutrophication concerns would disappear?
It clearly says sediment.
Overview for "sediment"
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The noun "sediment" has 1 sense in WordNet.
1. sediment, deposit -- (matter deposited by some natural process)
To me, shrimp poop on the bottom of a shrimp tank seems to fit the definition nicely.
