YOU SAID:

Turtles are invisible.

INTO JAPANESE

タートルズは見えない。

BACK INTO ENGLISH

I do not see the Turtles.

INTO JAPANESE

私はカメは見ません。

BACK INTO ENGLISH

I do not see a turtle.

INTO JAPANESE

私はカメは見ません。

BACK INTO ENGLISH

I do not see a turtle.