Yellow River fish don't eat fish food. According to the relevant public information, the yellow-tailed fish collected in the wild will have an adaptation process, and they will not easily open their mouths to eat until they are hungry. Yellow croaker is a small fierce fish, which belongs to eat small fish shrimp in the natural environment. So, like most gobies, it doesn't eat fish food, and basically feeds frozen red worms, so it can be full.