1. Firstly, soak the captured mackerel in ice water for a period of time to slow down the secretion of toxins in its body.

2, secondly, when dealing with mackerel, you can add appropriate amount of vinegar or lemon juice, the acidic substance helps to neutralize the toxins in the body of mackerel.

3, and finally, when eating mackerel, remove its internal organs, because the internal organs contain more toxins.