Fresh water fish farming

The red tide alga Prymnesium parvum poses a serious threat to fish farming. Prymnesin-2 (184) (CggHnsC NC ), the major toxin of the phytoflagellate, shows potent hemolytic and ichthyotoxic properties. The minimum concentration to cause hemolysis of a 1% mouse blood cell suspension and to kill fresh water fish, Tanichthys albonubes, is 3 nM [145]. 

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