YOU SAID:

he uses his gills to breathe underwater

INTO JAPANESE

彼は水中息をする彼の顔を使用してください。

BACK INTO ENGLISH

He use to breathe underwater and his face.

INTO JAPANESE

水中で呼吸の彼の使用および彼の顔。

BACK INTO ENGLISH

Water is his use of breathing and his face.

INTO JAPANESE

水は呼吸と彼の顔の彼の使用であります。

BACK INTO ENGLISH

Water is his use of breathing and his face.