Is the "cold water fish" cod a marine fish or a river fish? How much is the price per jin? Is it true what the supermarket sells? (with purchase method)

Cod, also known as big head green, big mouth fish, big head fish, water mouth fish, wide mouth fish, big head fishy, stone intestine fish, is one of the largest annual fish catches in the world. So is it a sea fish or a river fish? How much is the price per jin? Is it true what the supermarket sells? It is learned from the Guangzhou seafood market that the market price of cod is about 60,100 yuan per jin, and it depends on the origin and species of cod, such as black cod from Alaska in the United States, which is more expensive, about 130 yuan per jin.

Is cod a sea fish or a river fish?

1. Pure cod, which is divided into Atlantic cod, Greenland cod and Pacific cod. There are more than 50 species of cod, most of which are distributed in the continental shelf of the northern Atlantic Ocean. Important fish species include haddock, blue cod, haddock, haddock, Norwegian long-arm cod and haddock. Cod is one of the fish with the largest annual catch in the world, which has important edible and economic value.

2. Cod are distributed in the North Pacific Ocean, and both sides of the North Atlantic generally live near the bottom, bringing them from the nearshore to the deep sea area. Native to cold waters of the North Atlantic from northern Europe to Canada and the eastern United States. The main producers of cod in the world are Canada, Iceland, Norway and Russia, while Japan is mainly produced in Hokkaido.

China is mainly distributed in the Bohai Sea, the Yellow Sea and the northern part of the East China Sea. There are main fishing grounds in the northern part of the Yellow Sea, the east-southeast of Shandong High Angle, and the south and southeast of Haidao.

3. Cod cold-water benthic fish that feed on invertebrates and small fish. It lives in the cold water area of the Yellow Sea in summer and autumn, and overwinters in the coastal muddy bottom area with a water depth of 50m and 80m in winter. Most of the cod live in the cold seas with a temperature of 0 ℃ ~ 16 ℃ in the Pacific Ocean and the northern Atlantic Ocean.

Cod, which feeds on other fish and invertebrates, eats much and grows fast, growing up to 1 meter in about 10 years. Because of the group sex life, it is easy to catch, and it has been a famous edible fish since ancient times. Female fish with strong fecundity and a body length of about 1 meter can lay as many as 3 million to 4 million eggs at a time. During the reproductive period of the Yellow Sea from January to February, the number of eggs was 340000 ~ 830000, and the diameter of sunken eggs was 0.98~1.05mm.

Is the cod sold in the supermarket real?

Generally speaking, there are many kinds of "cod" in supermarket freezers. Five or six labels related to cod are affixed to a freezer, including "Alaskan silver cod", "Alaskan real cod", "frozen real cod", "frozen narrow cod" and so on. Some are 208 yuan a bag, and some are 28 yuan each. These cod are imported and domestic, expensive and cheap, while silver cod is cod, narrow cod is not cod, but other fish.

So for consumers, the most important thing to pay attention to is the water cod. Water cod has nothing to do with cod, but it is often imitated as cod because it looks like it. The vast majority of water cod on the market are oil fish, belonging to the perch order, which are also imported, but the price is 6-10 times cheaper than cod and silver cod, because their function abroad is to extract animal oil, not to eat. Residents of developed countries do not eat this kind of fish. Oily fish contains a lot of animal fat that can not be absorbed by the human body, and the content of animal fat is 20 times that of cod. These animal fats are harmful to human health, and some infants and young children with incomplete body functions may have abnormal stools after eating.

Attached: the selection and purchase method of cod

1, appearance: cod meat color is white, without the kind of particularly thick and obvious red line, fish scales are dense, pressing one piece at a time.

2. Fish skin: after the cod is thawed, it is smooth to touch the skin like a layer of mucous film. This is a real cod.

3. Fish scales: cod should be selected without scraping, because cod are generally unscraped when they are sold.

4. Taste: cod is a deep-sea fish, which tastes like crab leg meat. It is absolutely fake if it is soft and smooth.