Chaetoceros spp; Bacteriastrum spp and Rhizosolenia spp exhibited a similar pattern in the vertical distribution in the water column.
Their cell concentrations increased with depth, with the maximum concentrations observed at 40-meters depth and at a depth of 60-m and below, it diminished.
Thalassiothrix spp and Leptocylindrus danicus also exhibited a similar pattern.