Protoperidinium granii is a species of Dinophyceae in the family Protoperidiniaceae. They are native to Rio Grande Do Sul, Santa Catarina, Rio De Janeiro, Espirito Santo, Bahia, and Pernambuco.
Definition: Living in the fluid medium (water or air) but unable to maintain their position or distribution independently of the movement of the water/air mass (adapted from Lincoln et al., 1998).