むらさきいがいじゃなかったです
紫貽貝じゃなかったです
murasaki igaijanakattadesu

Noun
Desu Copula

The polite, past negative form of むらさきいがい

1. It wasn't a mussel.; It wasn't purple.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana