Left image - Gabriela Hannach, King County Environmental Lab.
Right image - Teri King, Washington Sea Grant.
Lauderia annulata are centric diatoms joined in short, straight chains. Cells are 24-75μm in diameter, with numerous, small discoid chloroplasts. Lauderia annulata are neritic and temperate to warm water.
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.