What are the varieties of freshwater fish and domestic freshwater fish

There are many kinds of freshwater fish, and more are suitable for feeding. For example, Hulk, sapphire, red rose, night pearl, etc. to raise these fish, we need to pay attention to maintaining the water temperature. At ordinary times, we should feed them regularly and quantitatively, not too much. At the same time, change the water every week or half a month, and the amount of water to change is about a quarter. Some fish with similar shapes and gentle characters can also be mixed. 1、 Hulk Hulk is a common freshwater ornamental fish. It is one of the Texas leopards, mainly distributed in North America and Mexico. As a carnivorous fish, it can not be mixed with other small fish. Moreover, the fish is strong and can survive in general water quality. The water temperature should be kept between 22-26 ℃, and the food intake is not large. There is no need to feed too much bait. 2、 Sapphire sapphire's scientific name is fire lip Rouli snapper. It is a freshwater ornamental fish with very beautiful color. The size of this fish is between 15-20 cm, the whole is spindle shaped, and the tail fin is fan-shaped. It is very easy to feed and has low requirements for water quality. It can survive in weak acidic and neutral water, and the water temperature can be maintained between 20-28 ℃. As omnivorous fish, they prefer animal bait. 3、 Red rose the scientific name of red rose is cherry barb. It is a small ornamental fish. Its color is red and will become more bright in estrus. Moreover, it has a mild temperament, can be mixed with small tropical fish, and is not demanding on water quality, as long as the temperature is between 20-25 ℃. However, their courage is small, so don't disturb them with a loud voice, and there is a case of cylinder jumping. It's best to add a cover when raising them. 4、 Night pearl night pearl is also called pearl butterfly. The young fish is black with white spots, so it is named. It is oval or rhombic as a whole, with a small mouth. It belongs to omnivorous animals and likes to eat algae. As a fish of Sparidae, it can be mixed with its kind. （DanShuiYuYouNaXiePinChong，JiaYangDanShuiYuYouNaXiePinChong）