Multiple choice Gonyaulax is a Blie dinoflagellate Green dinoflagellate Yellow dinoflagellate Red dinoflagellate Reveal answer Fill a bubble to check yourself D Correct answer Explanation Gonyaulax is a genus of dinoflagellates that causes red tides. It contains red pigments, and when it blooms massively, it can make the sea appear red. Hence it is correctly called a red dinoflagellate.