しぎうなぎじゃありませんでした
鴫鰻じゃありませんでした
shigiunagijārimasendeshita

Noun
Desu Copula

The polite, past negative form of しぎうなぎ

1. Was not a bittern eel.; Was not a loach.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana