Species: Akashiwo sanguinea | Dinoflagellate

Order: Gymnodiniales
Family:Gymnodiniaceae

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Description: Unarmored cells. Dorsoventrally flattened.  Epitheca is broadly conical and the hypotheca is bilobed. Large, central nucleus and numerous chloroplasts.Cells can be deeply pigmented or clear. 

Cell Size: Length = 40-80um

Distribution: Cosmopolitan in temperate to tropical coastal and estuarine waters.

Synonyms: Gymnodinium sanguineum, Gymnodinium splendens.

Interesting Facts: Forms extensive blooms that color the water red, often with Ceratium furca. Can be associated with fish kills.