Prymnesium parvum

Prymnesium parvum (class Prymnesiophyceae) has caused massive die-offs in ponds where fish are cultured, and Chrysochromulina polylepis (class Prymnesiophyceae) has caused major fish kills along the coasts of the Scandinavian countries. Other algae, such as Heterosigma (class Raphidophyceae) and Dictyocha (class Dictyochophyceae), are suspected fish…

…brackish-water pond fishes because of Prymnesium parvum have been reported in Israel; the poison is known as prymnesin.