The normal color of osmanthus fish liver is red. The liver of healthy osmanthus fish is ruddy, elastic and not fragile, and the ratio of size to weight is within a suitable range. If the liver color of osmanthus fish is green, khaki, white, or mottled, the texture becomes fragile, which is an abnormal performance. The liver is the main organ for fish to absorb nutrients. If there is a problem, it will affect the digestion and absorption of nutrients by fish, lead to an increase in feed coefficient and slow down the growth of fish, thus affecting the economic benefits of aquaculture.