Speaking of the general trend of the world, the combination of long-term must be divided into long-term divisions, and biological classification sometimes shows a state of "division and integration". It's not that taxonomists eat too much hybrid rice, but that the new classification may more accurately reflect the evolutionary relationships of organisms. This article is about the cod family, because there are changes...
Today it is not too much to say, only the species of cod in the family Cod. Only the fish of this genus are cod with red roots, like what kind of silver cod, expensive is expensive, but it is "false cod". In the past, there were three species in the cod genus: Pacific Cod, Atlantic Cod and Greenland Cod, all of which were considered real cod.
Figure 1
Fig. 2: "Big-headed fishy", that is, Pacific cod
The first species, The Pacific Cod/Gadus macrocephalus, is marked in supermarkets as "Alaskan Real Cod", which is also of this species, as shown on the left side of Figure 1. In Qingdao's aquatic products market, there is a fish called "big head fish", bloated, high water content in the body, light taste, low price, in fact, it is also an authentic Pacific cod, only because it is produced in the local sea and has been slighted. If you look at the environment in Figure 2, it is simply a big difference from Figure 1.
Figure 3: Atlantic cod
Figure IV: Atlantic cod
The second species, Atlantic Cod/Gadus morhua, is an internationally recognized cod figure, and the "Norwegian Arctic Cod" in the supermarket is it, as shown on the right side of Figure 1. Xiyi especially likes to eat cod, for this fish to turn the face of ruthless and even wary, from 1958 to 1976 Iceland and the United Kingdom broke out three fishing conflicts, these wars span nearly twenty years, known as the "Cod War". What's the picture? It wasn't much tasty, as light as the Pacific cod.
Figure 5: Greenland cod
The third, greenland cod/Gadus ogac, is also usually titled "Arctic", advertising pure green and pollution-free origin, and using this as a gimmick to attract customers.
From the perspective of traditional classification, there are only three kinds of real cod, and the rest are considered to be false. But now the cod genus has changed from three species to four, simply "minus one plus two". The independent species status of greenland cod/Gadus ogac has been deposed and merged with Pacific cod/Gadus macrocephalus, which means that the "big-headed fish" produced on the doorstep of Qingdao people and the Greenland cod from the Arctic are essentially the same thing.
So, what is "plus two"? The Norwegian cod and the yellow-lined cod/Gadus chalcogramma, which originally belonged to the genus Narrow Cod, were classified into the genus Cod because, according to new research, they are more closely related to the cod genus. The Norwegian narrow cod is rarely seen, omitted, but the yellow-lined narrow cod is very famous and common.
Fig. 6: Yellow-lined cod
Fig. 7: Yellow-lined cod with its head removed
Yellow-lined cod/Gadus chalcogramma, the "Mingtai fish" that Korean or Northeastern people love to eat, is sometimes called "Alaskan cod" in supermarkets, and more often appears as a "headless fish corpse", so much so that some people rumor that the fish's head is poisonous or has too many parasites... In fact, it is not, the yellow line cod catch is very large, for convenience, in the assembly line operation on the ship was all beheaded by them, anyway, the fish head has nothing to eat.
Fig. 8: Crab foot stick
Yellow-lined cod is also used to process a variety of foods, such as "crab foot sticks". Born in Japan in the 1970s, the appearance and taste of this object imitate the crab leg meat of the "snow crab" (chionoecetes opilio) or "tall crab" (Gan's giant crab / Macrocheira kaempferi), the real meat component usually comes from white sea fish meat, the most commonly used is the yellow line narrow cod. Of course, it is difficult to say how much fish there is in the "crab meat stick" you use to burn the hot pot.
With the exception of the Norwegian narrow cod, species of the cod family Are introduced. In fact, the taste of cod is light, the flavor is not strong, and it does not conform to the eating habits of Chinese. In the past, some soldiers from Qingdao Jiaonan once said that farmers on the seashore used cod as fertilizer (it should be Pacific cod), which showed that it was indeed not popular with the masses. However, cod surimi is a good food supplement for infants and young children, but "silver cod" is not good, because of the high methylmercury content. This should be noted, and must not be fooled by unscrupulous merchants.