Rhizosolenia are centric diatoms, approximately 20-70μm in diameter for R. styliformis and 4-20μm in diameter for R. setigera. These long, thin cells are generally solitary or found in short chains. The ends of the cells are short and needle-like. Many small chloroplasts are located throughout the cell.
Rhizosolenia are found in temperate 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 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.