A tiny ocean creature with whip-like tails that spins around, often creating glowing bioluminescent effects in seawater.
English form derived from Greek 'dino-' (terrible/whirling) + Latin 'flagellum' (whip), with '-ate' suffix indicating a member of a group. Coined in the 19th century as microscopy revealed these organisms.
Some dinoflagellates are so toxic they can kill entire fish populations and poison shellfish that humans eat—making them terrifyingly powerful for their microscopic size!
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