Ostreopsis
| Ostreopsis | |
|---|---|
| A cell of Ostreopsis cf. ovata | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Clade: | Diaphoretickes | 
| Clade: | Sar | 
| Clade: | Alveolata | 
| Phylum: | Dinoflagellata | 
| Class: | Dinophyceae | 
| Order: | Gonyaulacales | 
| Family: | Ostreopsidaceae | 
| Genus: | Ostreopsis J.Schmidt | 
| Species | |
| See text | |
Ostreopsis is a genus of free-living dinoflagellates found in marine environments. Some species are benthic; the planktonic species in the genus are known for the toxic algal blooms that they sometimes cause, threatening human and animal health.