| Singular | Plural | |
|---|---|---|
| Nominativ | ostrea, ostreatus | ostree, ostreae |
| Genitiv | ostree, ostreae, ostreai | ostreum, ostrearum |
| Dativ | ostree, ostreae, ostreai | ostreabus, ostreis, ostreisboletis, ostreisque |
| Akkusativ | ostream | ostreas |
| Ablativ | ostrea, ostreatus, ostread | ostreabus, ostreis, ostreisboletis, ostreisque |
| Vokativ | ostrea, ostreatus | ostree, ostreae |