The main characteristics of Dinophyceae are:
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The algae coming under this family is known as dark yellow to brown algae.
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They are commonly known as sea water planktons.
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They are free living, symbiotic or parasitic organisms.
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The reserve food materials are starch and oil.
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They possess characteristic nucleus which is condensed and banded chromosomes.
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The motile phases possess two dissimilar flagella.