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