YOU SAID:

he told me my fish would die

INTO JAPANESE

彼は私に私の魚は死ぬと言った

BACK INTO ENGLISH

He told me that my fish would die.

INTO JAPANESE

彼は私に魚が死ぬと言った。

BACK INTO ENGLISH

He told me that the fish would die.

INTO JAPANESE

彼は魚が死ぬと私に言った。

BACK INTO ENGLISH

He told me that the fish would die.