Pyrocystis robusta is a species of Dinophyceae in the family Pyrocystaceae. They are native to Rio De Janeiro, Paraná, Bahia, Rio Grande Do Norte, Espirito Santo, SãO Paulo, and Santa Catarina.
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).