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01
JulGenerally, it can be judged from the following situations:
(1) From the eating situation. When the weather, water temperature and other environmental factors do not change much, if the fish's food intake suddenly drops or even stops eating, it is most likely that the fish is sick.
(2) From the activity situation. If a fish swims alone on the surface (in the water), moves slowly or stops floating on the shore; some fish behave impatiently, swimming wildly in the water, turning in circles or jumping out of the water frequently, or having its tail often lifted out of the water, etc. Abnormal situations are all signs of fish sickness.
(3) From the body color of the fish. Healthy fish have normal body color, and most sick fish will have body color changes, such as blackening of the body, lightening of body color, redness or whitishness, etc. If dead fish have appeared in the pond, the possibility of fish disease is very high