Brachydinium sp.
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| Taxonomic Group: | Dinoflagellate |
| Trophic Status: | Autotrophic |
| Size Range: | N/A |
| Key Characteristics: | Large unarmored cell with four arms radiating from the hypotheca; epitheca with apical process or reduced arm; ovoid nucleus occupies most of central body; chloroplasts present |
| Confused With: | |
| Toxin: | None known |