いそがにでわありませんでした
磯蟹ではありませんでした
isoganidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of いそがに

1. Was not a shore crab.; Was not an isogani.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana