Freshwater white shark native to Malaysia, Thailand and other places, the body is smooth and scaleless, long and flat side, with fat fins, body pink white, the ends of the red fins. The suitable water temperature for the growth is 20°C-36°C. When the water temperature drops to 14°C-18°C, the activity is weakened or even stopped. The water temperature is lower than 12°C and it begins to die. It is suitable for breeding of surplus hot water in the south or Wenpen and thermal power plants. Because it has the advantages of bright color, fast growth, high food intake, low oxygen tolerance, strong disease resistance, simple breeding techniques, low feed requirements, less intermuscular puncture, and delicate and tender meat, it can be used as a food fish. With high ornamental value, its cartilage tissue contains chondroitin sulfate with higher nutritional and medicinal value, and is a better freshwater culture species in China.
Fish Disease Prevention
Intestinal disease: The diseased fish is slow to move, does not eat, the abdomen swells, the body color turns black, the anus is red and swollen, and the abdomen is lightly pressed by hand. Yellow mucus flows out. The abdomen is opened and the body cavity fluid is increased. The intestinal wall is congested, reddish-brown and fasting. Black mucus, sick fish died faster. The prevention and treatment can be fed with 0.1-0.3 g of garlicin per kilogram of feed, fed with berberine chloride and feeding at the same time. At the same time, the water body is disinfected with dichlorohydantoin or bromoxanthine every other day, and the treatment effect is very good.
White spot disease: also known as small melon worm disease. On the fish's skin, fins or gills, there are white spots and a large amount of mucus is secreted. Microscopic examination reveals the small melon body. In addition, worms, third-generation worms, ring insects, etc. may be parasitic. Can be used insecticide 0.5 mg / l spill or add 4% fish feed in the feed feed to drive the insects. The fish is more sensitive to fish infestation, insecticide or trichlorfon, and should be used with caution when used. The side effects of traditional Chinese medicine preparations such as insect repellent essence and fish insect clearance are small.
Gill disease: Symptoms include caudal fins, anal fins, and dorsal fin congestion and ulceration. The disease is caused by a bacterial infection that can cause a large number of deaths within two to three days. Fish species are common. The treatment method is 1 meter deep water per mu, and 200 grams of 100 grams of poisonous liquid is sprayed in the whole pool and used twice, and the treatment effect is very good.
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