Prepare a Spanish mackerel.

Step 2: Head and viscera of Spanish mackerel are removed and washed.

Step 3: Spanish mackerel cuts the fish head from the fish tail with a knife attached to the fish bone.

Step 4: Take out the fishbone.

Step 5: Remove the fish skin.

Step 6: Chop the fish.

Step 7: Put the chopped fish into the container.