しびれなまずじゃありませんでした
痺鯰じゃありませんでした
shibire namazujārimasendeshita

Noun
Desu Copula

The polite, past negative form of しびれなまず

1. Was not a catfish.; Was not a numb catfish.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana