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Photo of <em>Chaetoceros concavicornis</em> by Gabriela Hannach, King County Environmental Lab

Photo credit: Gabriela Hannach, King County Environmental Lab

Phytoplankton of the month — June 2019

Chaetoceros concavicornis

Chaetoceros concavicornis have cells 12-30μm wide, sometimes solitary but most often joined in straight chains. The upper valve of each cell is rounded, with setae originating from the center; lower valves are flat, with seate originating from inside the valve margins. Setae are thinner at the base and become wider away from the cell. Chaetoceros concavicornis are cosmopolitan and sometimes common in northern temperate and cold water areas.

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.

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