The stone grows in the throat under the occipital bone of the head of the mackerel, and it is relatively easy to take it out. We can use scissors to cut the fins, and then break the big joints, break open and see the bone color is not the same as the "heart-shaped foreign body", this heart-shaped foreign body is the mackerel stone, and then we use a stainless steel spoon to gently pry out the mackerel stone.

The mackerel stone is not the mackerel's dental calculus, but the angular growth of the mackerel's throat area, the main role is to be used to assist in crushing the hard shell of the snail, so that the mackerel will be able to eat the delicious snail meat.

With the same size of mackerel, the mackerel stone corresponding to wild mackerel is definitely bigger than the mackerel stone corresponding to bred mackerel, and the mackerel stone taken out by wild mackerel is thicker and of better quality.