Dragon Fan, the scientific name of Chinese giant grouper, also known as pig lamb spot, is a warm-water marine bottom fish, belonging to Perciformes, Grouper, Grouper subfamily and Grouper genus. It has a long oval shape, a flat side and a large mouth, and many blue-black spots are scattered on the head, side and fins of the fish, so it is a large and precious edible fish. In natural sea areas, adult fish are generally 6 cm ~7 cm in length, up to 2 meters in maximum, and about 3 kg ~ 4 kg in weight, up to 1 kg ~16 kg in maximum. According to records, in July, 1999, Hong Kong fishermen once captured a female dragon-dolphin in dongsha islands, weighing 18 kilograms, and were regarded as the king of dragon-dolphin.
Dragon Bones are bottom-layer carnivorous fish, and like to inhabit the sea area in the reef plate, with the depth of about 6 meters. They feed on benthic crustaceans and small fish and shrimp. Although it doesn't swim fast, because of its special body structure, it often preys by surprise, which makes its prey unprepared. Artificial culture can use fresh miscellaneous fish and shrimp, cut them into pieces and feed them, and sometimes add powdered compound feed for marine fish.
most bonobos live in tropical and subtropical coral reef areas. According to records, it is not only produced in China's Xisha, Nansha Islands and southern Hainan Island, but also distributed abroad in the Red Sea, the Indian Ocean, the east coast of Africa to the central Pacific Ocean, Australia in the south and southern Japan in the north. Dragon fans don't show up easily in the sea, and experienced fishermen often catch them with longline fishing, hand fishing or bottom trawl.
It is said that the Dalongfan, which weighs more than 15kg, has been living at sea for forty or fifty years, so it is more difficult to catch, and occasionally catching it becomes a rare thing. Lobster fish is a kind of rare fish in the ocean. It is delicious, nutritious, and tastes better than common grouper. It can make a variety of seafood dishes. At present, the supply is scarce and the price is expensive. In the Guangzhou market, the wholesale price per kilogram is as high as 19 yuan, and restaurants and restaurants sell it for more than 2 yuan, but it is still favored by people.
Dragon's fin is an original wild fish species, which can be cultured artificially. At present, artificial propagation of seedlings and adult fish culture have been successful in Shenzhen, Guangdong. According to reports, the artificial culture of the dragon's fin grows fast, and the factory culture is carried out by using the cement pond. The fish species weighing 22 grams and 1.2 centimeters in length are stocked. After 36 days of culture, the average weight of each fish has increased to 183 grams, and the absolute weight gain is 188 grams. Among the cultured species of marine fish, this growth rate is extremely rapid and the weight gain effect is obvious. According to the breeding experiment, after one year's breeding, each dragon can reach 1.5 kg ~ 2 kg, and 12.5 kg ~ 15 kg in the second year. In that year, the smallest individual was 75g, and the largest individual was 2,5g, and 7% of the fish weighed between 1,5g and 2,g, with relatively neat specifications, so the economic benefit of dragon fin farming was considerable. Therefore, according to market needs and resource conditions, all localities can actively study and develop the culture of arowana.
According to observation, dragon fans do not easily appear in the sea, and experienced fishermen can only catch them by longline fishing, hand fishing or bottom trawling. Dragon fin is a rare delicacy in the ocean. It is a famous seafood product with fresh meat and rich nutrition. Its pharmacological function is also good, and it can treat hypertension, hyperlipidemia, coronary heart disease and cardiovascular diseases.