1. Different light: The discoloration of traffic light fish may be due to different light and viewing angles. There are two red and green ribbons on both sides of their bodies, and their colors are different under different angles and light. Especially when they swim faster, they may form halos.

2, too strong light: It is also possible that traffic light fish change color because of too strong light. Wild traffic light fish live in a dim environment. When raised artificially, if the light is too strong, their body color will change greatly.

3. Illness: The discoloration of traffic light fish may also be illness. Under normal circumstances, the body color of traffic light fish will change greatly after illness.

1. Feed colorful feed: If you want to make traffic light fish colorful, you should feed them more colorful foods, such as bumper shrimp and red worms. You can also choose to feed some colored feed, but the colored feed is not easy to digest, so breeders need to pay attention to the feeding amount.

2. Keep the environment stable: The environment also has a great influence on the body color of traffic light fish. To make their body color bright, it is necessary to keep the water temperature and water quality stable. Heating rods can be installed at ordinary times to keep the water temperature constant. Filters can also be installed to slow down the deterioration of water quality.