Small fish caught in the Beijing River have small blue spots on their cheeks and many stars on their fins. What kind of fish is this?

Betta mainly inhabits ponds, swamps, rice fields and other areas with slow water flow. They live in communities covered by aquatic plants and feed on zooplankton, aquatic insects and mosquitoes. The optimum water temperature range is about 20 ~ 27 degrees Celsius, but it can still survive in the water temperature of 4 ~ 38 degrees Celsius. The pH value suitable for life is 6.0~8.0.