A marine photosynthetic protist has stiff cellulose plates and one longitudinal and one transverse flagellum. What may h
The organism is a dinoflagellate. Red dinoflagellates such as Gonyaulax may multiply rapidly, causing the sea to appear red. Toxins released in such blooms may kill fishes and other marine animals.
Ref: NCERT Class 11 Biology Chapter 2: Biological Classification Protista - Chrysophytes and Dinoflagellates