YOU SAID:
the banana took his fish for a walk
INTO JAPANESE
バナナは魚を散歩に連れて行った
BACK INTO ENGLISH
The banana took the fish for a walk.
INTO JAPANESE
バナナは魚を散歩に連れて行った。
BACK INTO ENGLISH
The banana took the fish for a walk.
That didn't even make that much sense in English.