 "D. norvegica" and "D. acuminata" are a very similar species as a result, they exhibits similar behaviors and are commonly misidentified[1].Furthermore, other ways to identify "D. acuminata" from other "Dinophysis" species can be done by comparison of the left sulcal list (cellulose extensions of the cell[5]) and LSL identification in ribs[1].Cells have convex dorsal margins and small oval shaped cells and their thecal plates are covered with areolae (circular depression on the cellulose wall of a dinoflagellate[5]) each with a pore[4].Continuously, the knob-shaped protrusions and round antapex (botton end of a dinoflagellate[5]) are ways to identify D.acuminata[4].