Phytoplankton, or single celled marine plants, are organisms at the base
of the food chain that are the food for many higher level organisms. Of the
thousands of phytoplankton species, less than hundred or so are considered
harmful. Those that produce toxins (poisons) or cause physical damage with sharp spines
are members of groups called diatoms, dinoflagellates and raphidophytes. In
the following sections we describe which phytoplankton on west coast of North
America are harmful and how they cause harm to fish, marine mammals, and sometimes
even humans.
To read more about HABS and Marine Biotoxins please use the navigation
bar to the right or click on the links below.
Phytoplankton
Marine Biotoxins
West Coast HABS