びわひがいじゃありませんでした
琵琶鰉じゃありませんでした
biwahigaijārimasendeshita

Noun
Desu Copula

The polite, past negative form of びわひがい

1. Was not a perch.; Was not a sweetfish.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana