This article introduces you to green grouper, a high-grade fish suitable for farming in the south of China, for reference.
1, green grouper morphological characteristics and temperature grouper body oval, laterally compressed, large head, short and bluntly rounded kiss, large mouth, with a well-developed laying on the bone, the body clad in fine pectinate scales, dorsal fins are powerful, and the body color can be changed according to environmental changes.
Adults are usually 20 to 30 centimeters long.
The grouper prefers to inhabit sea areas with rocky, gravelly, and coral reef substrates near coastal islands, and is generally not found in schools.
The habitat layer rises and falls with the change of water temperature.
Spring and summer distribution in the water depth of 10 to 30 meters, the summer season will also appear in the water depth of 2 to 3 meters; fall and winter when the water temperature drops, it swims to the deeper waters of 40 to 80 meters.
The temperature range is 15-34℃, and the optimal water temperature is 22-28℃.
Salinity range is wide, can survive in the sea salinity 10permi1; above.
It is a carnivorous and ferocious fish that preys on benthic crustaceans, various small fishes and cephalopods by raiding.
2, the ecological habits of the green grouper grouper for male and female homozygous, with sexual conversion characteristics, the first sexual maturity of all female, and then converted to male in the following year, therefore, males are significantly larger than females.
The green grouper can mature sexually at the age of one week, and the amount of eggs it carries varies with the size of the fish, and the amount of eggs it carries is about 150,000 to 200,000, and it spawns in batches, and it spawns floating eggs, which are round and have an oily globule.
After hatching, the young fish will grow along the shoreline to solicit bait.
Grouper grows rapidly, such as salmon point grouper, the first age can grow to 250-300 grams, the second age of fish weight up to 500-600 grams, the third age of fish weight up to 800-900 grams; red point grouper and green grouper, the first age of fish weight up to 200-250 grams, the second age of fish weight 400-500 grams, the third age of fish weight up to 700-800 grams.
3, green grouper nutrition and economic value of green grouper meat tender flavor, rich in nutrients, favored by consumers, especially in Southeast Asia, Japan and China's Hong Kong and Macao, in short supply, expensive, is a kind of valuable economic fish, its economic value is very high.
In addition, green grouper grows fast, has strong adaptability to the environment and strong resistance to disease, and is the main species in the grouper aquaculture industry in the south of China.
Besides the green grouper, there are more than 10 species of grouper distributed along the coast of China, among which the species with high economic value and more common are red-spotted grouper, salmon-spotted grouper, clouded grouper and reticulated grouper.