2. Wild black tiger prawns are sold in Qingdao at about 1 kilogram per 100 yuan, in Shantou at about 1 kilogram per 140 yuan, and in Zhangzhou at about 1 kilogram per 120 yuan, so the price can vary greatly due to different markets.
3. Generally speaking, black tiger prawns are expensive and cheap depending on where you buy them, so try to visit your local market. In addition, although black tiger shrimp and prawns have horizontal stripes on them, they have some differences in appearance, source and nutritional value.
I. Black Tiger Shrimp
1, because the black tiger shrimp likes to grow in fresh water, similar to aquatic plants, so it is also known as grass shrimp, not only fast-growing, but also a short reproduction cycle, large individuals, so many farmers breeding.
2, black tiger shrimp, there are many places of origin, distributed at home and abroad. Which is produced abroad in the Philippines, Thailand, India, Australia, India, Nigeria and Africa, the eastern seaboard and its domestic production is mainly in the coastal areas of China.
2. What is the difference between black tiger shrimp and ordinary shrimp?
1, different shapes: black tiger prawns have earthy yellow and black-brown stripes on the back, the upper beak of 7 ~ 8 teeth, the lower beak of 2 ~ 3 teeth, the lower side of the spine, dorsal spine, there are obvious grooves; nine prawns are large, hard shells, the back of the transverse stripes deep and shallow, boiled on the back of the nine white patterns.
2, different places of origin: black tiger prawns are mostly produced in the coastal areas of China; most of the prawns are distributed in southern Guangdong and Fujian, Guangdong, which is a popular area.
3, different nutritional value: black tiger shrimp and ordinary shrimp similar, but also rich in astaxanthin, than the amount than, ordinary shrimp 20% higher, with strong antioxidant activity. Regular consumption can effectively improve atherosclerosis and other diseases; the shrimp is rich in nutrients, contains magnesium, can effectively protect the cardiovascular system, prevention of hypertension, nourish the blood and fix the essence, appetizer phlegm. Regular consumption can effectively prevent hypertension, cholesterol, myocardial infarction and other diseases, is very suitable for the weak, sick need to regulate the crowd. Third, the reason why shrimp black
Shrimp black is mainly the role of enzymes. Shrimp body contains a substance called tyrosinase, tyrosine in the role of tyrosinase, can gradually form quinone substances, and then the formation of eumelanin, brown melanin and other black substances. Shrimp whole body have tyrosinase distribution, but the head of the tyrosinase activity is the strongest, the abdomen and tail of the enzyme activity is lower. The head of the shrimp is also where the internal organs of the shrimp are located, if the shrimp eat a lot of dark-colored algae, such as brown algae, before fishing, there may also be shrimp hair black.