あぶらそこもつじゃありませんでした
脂底鯥じゃありませんでした
aburasokomotsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of あぶらそこむつ

1. Was not a fatty flounder.; Was not a type of flounder.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana