What kind of fish is not afraid of hypoxia and is easy to raise? What are the fish that can tolerate hypoxia?

There are many fish that are not afraid of hypoxia, such as guppy, Mary fish, moonlight fish, goldfish and betta. Most of these fish are small, so they can live in an environment with low dissolved oxygen. Others have special auxiliary respiratory organs, so they can breathe on the surface of the water. Low dissolved oxygen will not affect their lives. However, in order to make the fish grow better, it is better to use an oxygen pump to oxygenate.

1. Gu

ppy Guppy is the most common species of small tropical fish. It is not big, but its tail accounts for one third. Its gorgeous color makes it very popular with people. This kind of fish is not big, has a strong ability to adapt to the environment, and can tolerate dirty water, and can be well raised in an environment with low oxygen.

2. Goldfish

Goldfish is a common ornamental fish in China. Unlike many tropical fish, it belongs to eurythermic fish, so it can survive in a lower temperature environment. In addition, because of its small size, the demand for dissolved oxygen is not high, but the premise is not to raise too much, otherwise there will be anoxic floating head.

3. Mary

fish Mary fish and guppy belong to the same small fish of the family Poeciliidae. This kind of fish has strong resistance to pollution and can use the surface water film, so it can survive in waters with low dissolved oxygen. It feeds mainly on algae and organic debris, but also on some aquatic animals, and has a wide range of salinity adaptation. There are many kinds

of fighting fish, such as Thai fighting fish, Chinese fighting fish, round-tailed fighting fish and so on. These fish live in different waters and have different temperature requirements, but they must have the same one, that is, they all have suprabranchial organs, through which fish can breathe on the surface of the water, so they are not afraid of lack of oxygen.