Main Page | See live article | Alphabetical index In marine geology and marine biology, Benthos are the organisms and habitats of the sea floor, in freshwater biology the organisms and habitats of the lakes, rivers and creeks. From the size of organisms there are distinguished macrobenthos, size > 1 mm meiobenthos, size > 0.063 mm microbenthos, size <0.063 mm Benthic organisms play a great role as food for fish and men, but also as destruents. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.