Among the common marine fish in the market, hairtail, Spanish mackerel, pomfret, yellow croaker, sardine, old croaker, small yellow croaker, etc. cannot be cultured artificially, and squid and squid cannot be cultured artificially; There are perch, black skirt, large yellow croaker, six-line fish, crabs, jellyfish and other seafood both caught and farmed; Basically, all of them are cultured artificially, such as flounder, yellow flower, turbot and semi-slippery tongue.

Hairtail and Spanish mackerel are the main road fish on the public table. Yu Guiyun introduced that the annual catch of hairtail in Shandong Province is 12. 60,000 tons, mainly produced in Zhoushan fishing ground in Zhejiang, offshore Fujian, Shidao fishing ground in Shandong and offshore Rizhao. Hairtail in Bohai Bay used to be very famous, but now it is rare. Spanish mackerel is all caught, and it grows in the coastal waters of Shandong Province. The annual catch is 18. 80,000 tons, ranking first among all kinds of marine fish.

Yu Guiyun also introduced that the annual output of squid in the caught seafood is 15. 30,000 tons, 90,000 tons of small yellow flowers and 4 pomfrets. 60,000 tons, squid 1. 70,000 tons, Nibea albiflora 1. 60,000 tons, sardines 1. 50,000 tons, cod 0. 560,000 tons. More than 90% of jellyfish are caught naturally, and 4% of prawns. The annual output of 40,000 tons is mainly farmed, and the species are China prawn, Japanese prawn and Penaeus vannamei.

Annual catch of crabs II. 80,000 tons, and the aquaculture capacity is 2. 1 10,000 tons, and river crabs are mainly cultivated. The famous Laizhou ribbed crab naturally grows in the sea. In recent years, Shandong Province has implemented a large-scale proliferation and release, releasing a large number of crab seedlings into the sea and then catching them again.

According to statistics, the annual output of marine fish in the province is1730,000 tons, of which fishing 16 1 10,000 tons, and the rest are cultured.

Farmed animals are not necessarily inferior to wild ones.

Many consumers are biased against farmed seafood, thinking that farmed seafood is not as good as caught seafood. Li Lujing, a researcher at the Provincial Fisheries Technology Extension Station, said that this is actually a misunderstanding. Many cultured fish, such as perch and black skirt, are mostly cultured in offshore deep-water cages, which are close to the natural state. Shellfish seafood, such as scallop and clam, is protected in natural state and belongs to natural production.

Most of the fish and shrimp cultured in ponds are also cultured in strict accordance with the requirements, and even the water quality environment of the cultured fish and shrimp is better than the natural water environment.

Some people think that yellow crabs and female shrimps and tigers in hotels are controlled by drugs. Li Lujing said that this is pure nonsense. Shrimp and tiger are all caught, and there is no artificial breeding. As for the yellow crabs, the operators specially picked them out from a large number of crabs.

Li Lujing introduced that Shandong province has always been at the forefront of the country in healthy farming or ecological farming. Healthy breeding refers to a kind of breeding method that keeps the cultured organisms in the most suitable state for growth and development, reduces the occurrence of breeding diseases and improves the quality of products by adopting technical measures such as putting in disease-free seedlings, feeding complete feed and artificially controlling the environmental conditions of breeding.

One of the healthy farming methods is factory farming.

Perfect factory farming includes special facilities such as running water aquaculture pond, water quality control, water temperature regulation, water purification, etc. Now some advanced farms are equipped with automatic water quality monitoring equipment, and the production process is fully controlled by using pre-set programs of electronic computers. Therefore, factory aquaculture is a modern aquaculture integrating industrialization, mechanization, informationization and automation, and it is the highest scientific and technological content and the best aquaculture method at present.

Most of turbot in Shandong province adopts factory farming.

Factory farming originated in the 1960s, and after decades of development, it has become the forefront of aquaculture in the world today. At present, factory farming is very popular in developed countries, and besides fish, aquaculture varieties include shrimp, crab, shellfish and algae.

Another way of healthy farming is deep-water farming.

Deep-water culture, also known as deep-water cage culture, was formed after the traditional shallow-sea cage culture was extended to deeper waters. Deep-water cage culture is far from the coast, with good water quality, less pollution, rich natural bait and high degree of intensification, which can produce a large number of high-quality aquatic products and is very popular among fishermen. Deep-water cages in Shandong Province have grown to 1870 this year, ranking first in China.

At present, the species that have been cultured in deep water are mainly fish, including sea bass, black pomfret, flounder, turbot, six-line fish, black snapper, red snapper and grouper.