2. Most cod in the market have no fish head, because the fish head of cod has no edible value and contains certain toxins, which is harmful to human body.

Therefore, when people catch cod, they will head off first.

4. In addition, from the economic point of view, it is easy to understand the handling of cod heads, because their heads will occupy a lot of space and weight during transportation.

The merchant will dispose of the fish head in advance, which will help to save costs.