外来 がいらい生物 せいぶつじゃありませんでした
gairaiseibutsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 外来生物

1. Was not an alien species.; Was not a foreign organism.; Was not an invasive species.

Past/Perfective
Negative
Polite
Terminal Form