The head of Macrobrachium nipponense is larger than that of Macrobrachium nipponense, and the maximum length is about 40 cm, while the head of Macrobrachium nipponense is generally smaller, and the maximum length is about 20 cm. The head of the stone shrimp is much bigger than that of the new shrimp with a knife. Generally speaking, the shell of Rorschach shrimp is bluish-brown, its forelimbs are long and bluish-blue, its head is bigger than its body, and it gradually becomes smaller from beginning to end. However, the whole body of Neoshrimp with a knife forehead is dark brown and must be red, its feet are uniform from front to back, and its body and head are almost the same size.
Although Roxburgh shrimp and Neopenaeus monodon belong to freshwater shrimp, Roxburgh shrimp belongs to Macrobrachium and Neopenaeus monodon belongs to Neopenaeus monodon, which are not exactly the same. The shell of rock shrimp is thin and fleshy, and it tastes fresh, tender and delicious, refreshing and elastic. In addition to the taste of green shrimp itself, the mature stone shrimp head also has a delicious taste similar to "crab yellow". The new prawn is relatively soft, and its smell is not as fragrant as that of shrimp Rorschach.
Method of purchasing new prawns with a knife amount
We should observe the freshness of the new prawns when we buy them. If it is found that the new prawn is floating on the water, it is mostly because of lack of oxygen, and the person who feels motionless may be dead, so the new prawn like this is not new, but if the new prawn is submerged in the water and its feet are standing in it, it is relatively new, and its tail will shake in its hand.
By observing the lines of the belly of Neopenaeus monodon, we can also judge whether the Neopenaeus monodon is fresh. If it is found that the lines are not clear enough and the abdomen is milky white, then the meat of the new prawn will be loose and fishy, and the new prawn is not fresh enough to eat. Fresh prawn with knife forehead, the belly lines of prawn look clear, and there is no abnormal fishy smell, so you can buy it with confidence.