まこがれいでわありませんでした
真子鰈ではありませんでした
makogarēdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of まこがれい

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

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana