Betta fish mainly refers to small fish belonging to the Perciformes, Anabantoidei, Osphronemidae, and Betta subfamily, with a total of 14 genera and 86 species. Due to the large variety. Different species of betta fish have different native environments and different tolerance to low temperatures. Here are the suitable water temperatures for several common betta fish species:
1. Thai betta fish: The optimal water temperature is 22-24 degrees Celsius, and the lowest temperature cannot be lower than 18 degrees Celsius.
2. Round-tailed betta fish: The optimal water temperature is 24-27 degrees Celsius, and the lowest temperature cannot be lower than 6 degrees Celsius.
3. Fork-tailed betta fish: The optimal water temperature is 20-25 degrees Celsius, and the lowest temperature cannot be lower than 0 degrees Celsius.