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Dinoflagellate Dinophysis rotundata Japanese strains of this species produce the toxin Dinophysistoxin-1, which causes diarrhetic shellfish poisoning, but North American strains are non-toxic. Upper Newport Bay, Newport Beach, Orange County, CA. 3/16/13. © Joana Tavares and Peter J. Bryant. Phylum Dinoflagellata; Dinokaryota; Dinophysiales Back to Dinoflagellates of Orange County, California |