One of the three fresh Yangtze River "puffer fish"-redfin Fugu

The redfin Fugu belongs to the class of teleost, pufferiform, pufferiform, pufferiidae, and pufferiidae. It is a warm-water marine benthic fish, distributed in the western North Pacific Ocean and caught in various sea areas of China. The false-eyed Oriental dolphin often enters the waters of the middle and lower reaches of the Yangtze River and the Yellow River,

Meat contains 28.2% protein, 13.15% fat, 0.597% ash (containing phosphorus, calcium, iron, etc.), viscera, blood, ovary and skin contain tetrodotoxin (Tetrodonine), tetrodotoxin (Tetrodonic acid), tetrodotoxin (Tetrodotoxin) and tetrodotoxin (Hepatoxin). Fugu viscera (liver and ovary, etc.), blood and skin are highly toxic, and can be killed by accidental ingestion. Muscle is non-toxic and edible.

The redfin Fugu is long and round, with a relatively square and flat head, and some have beautiful markings; some have no markings, but a black fish. It is also described that the puffer fish has a diamond-shaped appearance, with its eyes recessed and half exposed, and its upper and lower teeth each have two teeth shaped like human teeth. Small gills are not obvious, the belly is yellow and white, dorsal abdomen has small white thorns, fish body smooth without scales, black yellow. Puffer fish mouth small head round, back black brown, white abdomen, large 1 meter long, weighing about 10kg, eyes are usually blue-green, can also change color automatically with the change of light. There are not many bones in the body, and the dorsal and ventral fins are very soft, but they have two rows of sharp teeth that can chew up foods with hard shells, such as clams, oysters, sea urchins, etc.

Under the culture conditions, the growth rate of redfin Fugu was faster. During the period of raising seedlings, under the condition of water temperature of 15~30 dragon, the total length of the fry cultivated for about 60 days can reach more than 40mm; the growth rate of the newly stocked fry is generally slow, and the growth rate is accelerated in the rainy season after 30 days. During the cultivation period, in the coastal areas of southern China, the commodity specification can reach a weight of 300-400 grams in that year, and the commodity specification can reach a weight of about 1kg after one and a half years of cultivation. From July to December of the year, the growth rate is the fastest when the water temperature exceeds 20 beggars. In the coastal areas of northern China, the fry can only grow to a weight of about 200 grams, which takes about 2 years to reach 1 kilogram.

The mature male of the redfin Takifugu is 350mm long and the mature female is 360mm long. The spawning period is from March to May each year. The main spawning grounds in the coastal areas of Shandong are near the coastal waters of Rizhao, Qingdao and Rongcheng. The breeding period is from early May to early June each year, and the breeding period is in mid-May. The reproductive period of the redfin oriental blunt distributed along the coast of the Sea of Japan is from March to May.

In the breeding season, the ratio of male to female in the natural broodstock population is 1: 5O. At this time, the mature broodstock abdomen is obviously swollen, the female reproductive hole is congested and slightly everted. Milky White semen will flow out when male fish lightly press the abdomen. Mature female fish generally have a body length of 300~500mm and a body weight of 1000~4500g. Male fish have a body length of 250~450mm and a body weight of 900~3500g. The fertilized egg is a sink and viscous, and is attached to the gravel or rock at a water depth of about 20 meters after being produced. During the breeding season, parent fish enter the spawning grounds of the coastal bays from the open sea for reproduction, and soon leave the spawning grounds after laying eggs. In the breeding season, the surface water temperature of the spawning ground was 14~18, and the salinity of the sea water was 30~33.

The red fin oriental blunt is a one-time spawning fish, the minimum maturity age of female fish is 3 years old, the smallest individual mature individual is 360mm, and the reproductive group age group is 4~5 years old; the male fish sexual maturity earlier than the female, is 2 years old, with 3~4 years old as the dominant age group, the smallest individual is 350mm. The amount of eggs carried by female fish is 39-600000. The amount of eggs carried by parent fish weighing 2100-2500g is 50-800000. The amount of eggs carried by parent fish weighing 4100g is more than 1.4 million. The amount of eggs carried by parent fish weighing 4500g is about 1.5 million. The amount of eggs carried by parent fish weighing 6000-7000g is as much as 150-2 million. In the lineage group, the number of pregnant eggs 50~800000 grains of the individual most.

Redfin Fugu. Because of its delicious taste and rich nutrition, it is one of the lowest fat content in fish. It contains the highest content of protein, amino acid, DHA and EPA in fish, and is also rich in vitamin B1, B2, selenium, zinc and other trace elements. Therefore, it is known as "the king of fish". In major restaurants, red fin fish is often used to make puffer fish sashimi, with red ginger sauce radish paste and Japanese chives, flowers lemon vinegar, taste slightly sour, after taste fragrant back to sweet, meat is very tough.