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Chaetoceros socialis

One of the smallest members of the genus, 6-12u wide and a volume of 864 cubic microns, it is usually found in large, circular colonies held together by a mucilaginous material and/or very fine long, hair-like setae. Very prominent in Bay waters. Frequently lost or damaged during fixation of samples. The above photos were taken from a live sample collected in a 20u plankton net tow in the Rhode River.