Introduction:
Arowana, alias: Longtu bamboo fish, silver boat fish, also known as Yindai in the south, belongs to the family Ostracodontidae (also known as Ostracodontidae). Together with Arowana and Qinglong. They are collectively called arowana, which is a common large tropical ornamental fish.
Appearance:?
1.？ Arowana is long and flat, with a fan-shaped tail, and its dorsal fin and anal fin are strip-shaped and extend backward to the base of the tail stalk. The lower jaw is more prominent than the upper jaw and has a pair of short and thick beards.
2. Five rows of large scales are neatly arranged on its wide fish, which are shining silver in the light. Each fin reflects a bright red or orange luster under the light. The body color of young fish is blue; Both dorsal fin and anal fin have red and blue edges. The scales of Jinlong are golden, and all the fins are golden red. The body color of the red dragon is golden yellow, the scales are golden red, there are dark red spots on the mouth and gill cover, and all the fins are dark red. The body of the silver dragon is silvery white, the body of the black dragon is silvery white and purplish blue, and all the fins are blue black. Arowana can reach 50 ~ 100 cm in length.
Feeding conditions:
1. The water temperature of Yinlong can be controlled between 22 and 29 degrees, with 25 to 28 degrees being the best.
2. Domestic arowana is generally fed 2-3 times a day, and it is best to eat less and eat more meals. Feeding frequency decreases with the growth of fish, and regular feeding every day helps fish improve their physique and cultivate their feelings with people.
3.？ The temperature and water quality should be stable, and there should be no drastic changes.
Several common diseases of arowana;
1.？ White spot: caused by parasitic protozoa, a certain part or most of arowana's body is covered with white spots. It mainly affects the fins and reduces the appetite of arowana, and it is often seen that arowana rubs the body. Raise the temperature to 30 or even 34 degrees Celsius and add 3% salt. If it doesn't work, it will be treated separately in the medicine jar.
The main symptom is that the diseased fish is covered with white spots all over the body, like spreading white powder, and in severe cases, it is like covering the fish with a milky white film. The cause of the disease is caused by the parasitism of melon worms on fish. Main preventive measures: 1 spraying 0. 1 ~ 0.2 ppm mercurous nitrate in the whole pool; 2 Sprinkle 500ppm copper sulfate and 500ppm magnesium sulfate on the whole pool water.
2. Blindfold: The fish's eyes are covered by white material due to unclean water or external work. When the temperature rises to 30 or even 365,438 0 degrees Celsius and 3% salt is added, the water can be changed normally in 4-6 months.
3.？ Edema: Arowana lost its balance in swimming and stopped eating, which was caused by the sudden change of temperature or PH value, and died a few days later. Increase the water flow, gradually raise the water temperature to 34 degrees Celsius (increase 1 degree every 2 hours), increase 1% salt, put tetracycline every 2 days, and adjust the water quality with black water according to the instructions until it gets better.
4.？ Eyedrop: caused by long-term feeding of bottom food, it will recover after being put back into the pond. Cover the fish tank with opaque black paper, put a white lamp on the top of the fish tank, feed the top food or put an object on the top of the fish tank to attract the attention of arowana, and remove the black paper after 3 months.
References:
Double-bearded bone tongue fish Baidu encyclopedia