noun
dinoflagellates
A group of single-celled aquatic organisms, many with two flagella and often bioluminescent; used in biological and environmental contexts.
渦鞭毛藻類は赤潮の原因となることがある。
Dinoflagellates can cause red tides.
Compound of 渦 (whirl), 鞭毛 (flagellum), and 藻類 (algae), describing the group's characteristic spinning motion and flagella.