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There is a small fish called white shark. ? The kind of small fish you keep in a fish tank. Who knows the introduction?
Call it the blue shark. Blue shark, also known as axe shark and tiger shark, belongs to catfish family. Originated in Thailand and Malaysia, about 8~ 15 in length.

centimetre

, wild fish up to 50CM, 1,

Body shape and color. Freshwater sharks have four body colors: black, white, gray and red. There are many sharks in the first three body colors.

tropical fish blue shark

As an edible fish, especially the gray shark is the most popular. Its back is blue, its side is bluish gray, and its abdomen is silvery white. Red sharks, namely Crystal Bardeen, are mostly kept as ornamental fish.

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2. Adaptability and feeding habits. Freshwater sharks have strong tolerance to hypoxia and a wide range of adaptation, but weak tolerance to low temperature. The optimum temperature is 20℃-34℃, and the optimum growth water temperature is 26℃-32℃. When the water temperature is lower than 18℃, the activity is slow and the response is slow. Death began when the water temperature was lower than 65438 02℃. The food of this fish is mixed. Young fish feed on zooplankton, while adult fish feed on aquatic plants and artificial compound feed. Protein requirement of feed is 28%-32%.

3、

Growth and reproduction. Freshwater sharks are omnivores, which eat a lot and grow fast. In that year, fry (3-4 cm) were cultured for 4 months, and their weight could reach more than 0.6 kg, and their sexual maturity was late. After feeding for 3-4 years, they could reproduce when their weight was more than 3 kg. The breeding season is from April to September, and it is a one-time spawning fish.