遊泳 ゆうえう生物 せいぶつじゃありませんでした
yūeuseibutsujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 遊泳生物

1. Was not a swimming creature.; Was not an aquatic organism.

Past/Perfective
Negative
Polite
Terminal Form