The red-tailed black shark
The red-tailed black shark is a freshwater hot-tailed fish with a long body Up to 14 centimeters, the red-tailed black shark has a very special shape. It is dark black all over, but its tail fin is golden red and the color is obvious. Another characteristic of the red-tailed black shark is that it has two beards on its mouth.
The red-tailed black shark is a flowerpot oviparous fish, and its gender is distinguished by body shape and color. The male fish is thin and has a golden-red tail, while the female fish is slightly larger and has an orange-red tail. It is best to raise the male and female parent fish alone during the first half month of growth, feed them more fresh fish food, cover the bottom of the growth box with small black and white pebbles, plant broad-leaf aquatic plants, and set up an upside-down flower pot. The growth water is slightly acidic and the water temperature is 25-26°C. The male to female ratio is 1:1. Males and females consummate their marriages after half a month and usually lay eggs during the Qing Dynasty. The marriage of this fish strictly follows the "monogamy" system, and no third-party male fish is allowed to intervene. Otherwise, one of the two males will be injured when they fight, so you must be careful when pairing. This fish has the habit of protecting its eggs and generally does not eat its own eggs. The fertilized eggs hatch and emerge in 2 days, and then swim around for another 2 days and are fed "water".
It is worth noting that the sacrifice rate of juvenile fish is high when they are 2 weeks old, and nutrition must be enhanced. The body color of the juvenile fish is dark black. After 8 weeks, the tail fin turns red, and each fin is edged with white. When it grows up, it becomes a black body with a red tail shape.
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