さわがにじゃなかったです
沢蟹じゃなかったです
sawaganijanakattadesu

Noun
Desu Copula

The polite, past negative form of さわがに

1. Wasn't a Japanese freshwater crab.; Wasn't a shore crab.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana