The main difference between cold-water fish and tropical fish is the requirement for water temperature. Cold-water fish like low temperature environment and have strong cold tolerance. But it can't survive in warm water. On the contrary, tropical fish like to live in a warm environment. The temperature of water body is generally above 15 C, even up to 30 C.
The highest temperature that Mary fish can accept is 28 ℃, and the lowest temperature is 10 ℃. But it is easy to get sick at low temperature and can live normally at high temperature. Its temperature requirements are fully in line with the characteristics of tropical fish. Also, wild Mary fish live in the tropics. Therefore, it belongs to tropical fish.
Mary fish has a strong adaptability to temperature, and its tolerance range is relatively wide. Generally speaking, it can live normally in the environment of 18 ~ 28 ℃. If the temperature drops to 10 C, although its immunity will be reduced, it can also survive. When breeding, it is better to control the temperature above 18 C. Especially in winter, the temperature is easy to drop. If conditions permit, try to maintain the water temperature above 20 C. However, the most suitable temperature range for its growth and development is 22 ~ 26 ℃. In order to keep them better, it is most appropriate to maintain the temperature in this range.
