What is "prymnesin"

n. (context organic compound English) Any of a class of phycotoxins made by the alga (taxlink Prymnesium parvum species noshow=1), also toxic to fish.

Prymnesin is a chemical with the molecular formula .

Prymnesins are a class of phycotoxins made by the alga Prymnesium parvum. It is known to be toxic to fish, causing mass fish deaths around the world, including in Texas and England.