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Composed largely of dinoflagellates. These are tiny single-celled marine organisms with two long slender flagella (appendages) that lie in surface grooves at right-angles to each other. Some types are luminescent and some are toxic, especially when multiplying prolifically thus causing colorful blooms; sometimes called the “red tide”.
This entry is located in the following unit: plankto-, plankt-, -plankton (page 6)