The genus Gyrodinium spp. belonging to dinoflagellates including many species I am ask what the toxin producing by the important on in my region Gyrodinium estuariale and what the harmful effects on aquatic organisms and human health
You can find your inquiry in the book entitled: Seafood and freshwater toxins: Pharmacology, Physiology, and Detection. 3rd Ed. By Luis M. Botana, 2014. This dinoflagellate cause extensive fish kill.
Maybe this reference is useful for you:
Place AR, Bowers HA, Bachvaroff TR, Adolf JE, Deeds JR, Sheng J. Karlodinium veneficum—The little dinoflagellate with a big bite. Harmful Algae. 2012;14:179–195.