In recent years, healthy fish has been recognized by consumers. Healthy fish need to choose a suitable pond, that is to say, a fish pond with convenient transportation, good lighting, convenient drainage and convenient water intake is more troublesome than feeding mandarin fish. Healthy fish is a fierce carnivorous fish, which mainly eats small crucian carp, whether alive or dead. Personally, I think it is more troublesome to manage healthy fish. It is better to feed mandarin fish, which is simple to operate.