As the saying goes, scarcity is expensive, gold production is small, gold are sold by the gram, knife fish is the same. The number of swordfish is decreasing, when the fish is expensive not only because of its small number, but also its nutritional value is extremely high, resulting in the knife fish expensive price. Next, let's find out why knife fish is so expensive.

One, the number of swordfish is small

Swordfish is a migratory fish, and puffer fish, anchovies and known as the Yangtze River in China, one of the three fresh, its meat tender flavor, there is ? The world's first fresh? reputation. When the fish from the head to the tail gradually thin, rounded abdomen upper jaw long, more than the base of the pectoral fins, pectoral fins fins thin, there are 6 long filaments, anal fins long, and connected to the caudal fin, caudal fins short, anal fins soft strip of 80, the body length of up to 26 centimeters, the body length, body side flat, backward gradually thin tip was sickle-shaped, so it is named. Knifefish is generally 18-25 centimeters in length and weighs 10-20 grams. A freshwater fisheries research center from the Chinese academy of aquatic sciences quality shows that in 1973 the Yangtze River along the river knife production of 3750 tons, in 1983 for about 370 tons, in 2002 the production has been less than a hundred tons, and to the present, the knife fish production is even lower. Fishermen can only catch two small fish in half a day out of their boats, and if they are unlucky, they can't even touch the fishy fish. Historically, the knife fish was very famous, but now the number of knife coins is getting smaller and smaller.

Two, the nutritional value of the knife fish

The knife fish in the market is expensive and popular, is that it is rich in nutritional value, when it contains EPA and DHA, can reduce blood cholesterol, triglycerides, and reduce blood pressure, to avoid blood clot, is conducive to hypertension or coronary arteriosclerosis, in addition to the knife fish is also rich in Vitamin B, can delay aging. Knife fish back on the black part of the meat, there are many prevent anemia vitamin B12, fish is also rich in protein, and the human body indispensable eicosapentaenoic acid, docosahexaenoic acid and other unsaturated fatty acids, EPA, DHA inhibit hypertension, myocardial infarction, atherosclerosis effect. Swordfish is expensive for a reason, not only the number is small, and the nutritional value is very high.