YOU SAID:
I like walking my fish
INTO JAPANESE
魚を散歩するのが好きです
BACK INTO ENGLISH
I like to walk the fish
INTO JAPANESE
私は魚を歩くのが好きです
BACK INTO ENGLISH
I like walking fish
INTO JAPANESE
歩く魚が好き
BACK INTO ENGLISH
I like walking fish
That didn't even make that much sense in English.