YOU SAID:

You can fish a tuna but you can't tune a fish

INTO JAPANESE

マグロが釣れるが、魚は調整できません。

BACK INTO ENGLISH

Can tuna fish, but the fish cannot be adjusted.

INTO JAPANESE

マグロ魚をすることができますが、魚は調整できません。

BACK INTO ENGLISH

Can tuna fish, but the fish cannot be adjusted.