YOU SAID:

When he said I don't like the fish, I had to correct him because this fish is actually quite tasty

INTO JAPANESE

彼がその魚が好きじゃないと言ったとき、私は彼を正さなければならなかった。

BACK INTO ENGLISH

I had to correct him when he said he didn't like the fish.

INTO JAPANESE

彼がその魚が嫌いだと言ったとき、私は彼を正さなければならなかった。

BACK INTO ENGLISH

I had to correct him when he said he didn't like the fish.