The East Star stone fish is dead. What's half red and half white?

The pathogen of white spot disease of grouper is grouper mainly parasitic on skin, gills and fins. Epinephelus albiflora mainly shows white spots and irregular white spots on its body surface. In severe cases, leukoplakia expands into a piece, so the disease is commonly known as "leukoplakia". When a large number of groupers parasitize fish, it will cause skin and mucous membrane damage, increase mucus secretion on skin and gills, and make it difficult for fish to breathe and die without eating.

In summer, when grouper is cultured, there is a lot of fertilizer in the water, and a lot of feed, feces and residual bait are accumulated in the water. The weather is rainy, the water temperature is high, and the water quality is easy to deteriorate, which creates a breeding environment for parasites and bacteria and breeds a large number of parasites and bacteria. Long-term high feeding rate and water quality changes will cause damage and pathological changes to the liver and pancreas of grouper, which will lead to the decline of immunity and anti-stress ability of grouper. At this time, it is the time when parasites and bacteria multiply in large numbers, and the occurrence of white spot disease becomes very easy.