YOU SAID:

if we cant see air the can fish see water.

INTO JAPANESE

空気が見えない場合、魚は水を見ることができます。

BACK INTO ENGLISH

If you can't see the air, the fish can see the water.

INTO JAPANESE

空気が見えなければ魚は水が見えます。

BACK INTO ENGLISH

If you can't see the air, the fish can see the water.