Neon fat carp, commonly known as traffic light fish, is also known as red-lotus fish, neon fish, red-green neon fish and red-light fish. Its temperament is mild and timid, and it is a typical middle-level fish. Need a higher feeding environment. The suitable water temperature for living is 22-24 degrees Celsius, and the water quality requires weak acid and soft water. Keep the feeding water old and clear, and change the water less. The environment should be quiet and avoid direct light. The requirements for bait are not high, and fish worms, water worms and dry feed are all willing to eat. According to relevant data, the average life span of traffic light fish is 2 to 3 years. The life span of fish at traffic lights mainly depends on the living environment. If raised in a good environment, it may be healthier and live longer.