Photo credit: Dr. Vera Trainer and Brian Bill, NOAA
Chaetoceros debilis are centric diatoms that are 8-40 um wide, that connect into twisted chains. The ends of the cell walls are either flat or slightly concave with rounded corners. The spaces between the cells appear almost rectangular and slightly compressed. The spines start from inside the cell and extend outwards.
Chaetoceros debilis's distribution is cosmopolitan in cold waters.
For more information see:
A Taxonomic Guide to Some Common Marine Phytoplankton, by Rita Horner (Biopress Ltd. 2002)
SoundToxins, a diverse partnership of Washington state shellfish and finfish growers, environmental learning centers, Native American tribes, and Puget Sound volunteers, is a monitoring program designed to provide early warning of harmful algal bloom events in order to minimize both human health risks and economic losses to Puget Sound fisheries.