Genus: Ostrea
En ikke- introdusert art finnes langs norskekysten.
Systematics :
| Kingdom | Animals (Animalia) | ||||||
| Phylum | Molluscs (Mollusca) | ||||||
| Klasse | Bivalve mollusc (Bivalvia) | ||||||
| Subclass | Pteriomorpha | ||||||
| Family | Østers (Ostreidae) | ||||||
| Genus | Ostrea | ||||||
| Species | Flatøsters (Ostrea edulis) | ||||||
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