こばんさめじゃなかったです
小判鮫じゃなかったです
koban samejanakattadesu

Noun
Desu Copula

The polite, past negative form of こばんざめ

1. Wasn't a shark.; Wasn't a small, flat shark.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana