ぬまかれいでわありませんでした
沼鰈ではありませんでした
numa kareidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of ぬまがれい

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

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana