脊椎 せきつい動物 どうぶつじゃなかったです
sekitsuidōbutsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 脊椎動物

1. Was not a vertebrate.; Wasn't a vertebrate.

Past/Perfective
Negative
Polite
Casual Register
Zoology