Fish that can breathe oxygen from water

Oxygen-free fish are fish that can breathe oxygen directly from the water without the help of an oxygen pump. These fish have special organs that help in exchanging oxygen gas with water, such as gills, body surface, or swim bladder. Fishing that doesn't require oxygen The advantage is that there is no need to install an oxygen pump. Thus saving costs and space. But there is a disadvantage: the water in the aquarium must be changed more often than fish that require oxygen. This is because these fish excrete a large amount of waste in the water.
Beautiful fish that do not require oxygen that are commonly raised include:
Fighting fish are small freshwater fish. Found everywhere in Thailand Fighting fish are fish that have an aggressive personality and like to bite each other. Therefore, they are popular as fighting fish. ปลา ที่ ไม่ ต้อง ใช้ ออกซิเจน