| Singular | Plural | |
|---|---|---|
| Nominativ | catadromarius | catadromarii |
| Genitiv | catadromarii | catadromariorum, catadromarium |
| Dativ | catadromario | catadromariis |
| Akkusativ | catadromariom, catadromarium | catadromarios |
| Ablativ | catadromario | catadromariis |
| Vokativ | catadromarie | catadromarii |