| Singular | Plural | |
|---|---|---|
| Nominativ | ballaena | ballaenae |
| Genitiv | ballaenae, ballaenai | ballaenarum, ballaenarumque, ballaenum |
| Dativ | ballaenae, ballaenai | ballaenis, ballaenabus |
| Akkusativ | ballaenam | ballaenas |
| Ablativ | ballaenad, ballaena | ballaenis, ballaenabus |
| Vokativ | ballaena | ballaenae |