Most cod live in the cold seas of Pacific Ocean and North Atlantic Ocean, where the water temperature is 0℃ ~ 16℃. As long as you eat something moving, it will grow fast, and it will grow to 1 m in about 10 years. A female fish with a body length of about 1 m can lay as many as 3 to 4 million eggs at a time. It's easy to get caught because of group sex.

It has been a famous edible fish since ancient times. Cod head is poisonous and highly toxic. This is why the sold cod and the processed cod have no heads. But this does not affect its delicacy and nutrition, especially its fresh and odorless meat, which is an ideal choice for processing Japanese and Korean cuisine.

Extended data:

Arctic cod is a typical cold-water fish, which is distributed throughout the Arctic. When the temperature exceeds 5℃, they will disappear. It is a small and medium-sized fish, the longest of which can reach 36 cm, and it is one of the important economic fish in the Arctic.

In summer, Arctic cod mainly live on the edge of the frozen area of the Barents Sea in the Kara Sea. Juvenile Arctic cod feed on small phytoplankton and zooplankton. With the growth, the plankton it ate gradually changed from small to large, and some of them preyed on small fish.

By September every year, the Arctic cod began to migrate to the west and south, and laid eggs at sub-zero temperature in winter, which were floating eggs, and the number of eggs laid was 9000 ~ 18000. Because of the low water temperature, the incubation period is as long as 4 ~ 5 months.

Baidu encyclopedia -cod