きんぶなじゃありませんでした
金鮒じゃありませんでした
kimbunajārimasendeshita

Noun
Desu Copula

The polite, past negative form of きんぶな

1. It was not a golden crucian carp.; It wasn't a golden carp.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana