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