むしがれいじゃありませんでした
虫鰈じゃありませんでした
mushigareijārimasendeshita

Noun
Desu Copula

The polite, past negative form of むしがれい

1. Was not a flatfish.; Was not a flounder.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana