Fish diseases affect the survival and growth rates of fish under culture. Given that treatments are expensive, fish diseases invariably lead to lower harvest and higher cost. Fish farmers often suffer hefty economic losses due to fish diseases. To alleviate such losses, it is crucial to take precautions to prevent fish diseases and reduce pathogen levels in water bodies. It is also important to prevent water quality from deteriorating and to strengthen the natural resistance of the fish stock. Regular monitoring of fish health is an effective way to identify disease causes and appropriate treatments. One major cause of serious fish kill is overlooking the contagiousness of fish diseases and thus delaying treatment. As such, adequate care and treatment should be given to infected fish promptly. Causes of Fish Diseases There are three major causes of fish diseases: a. Presence of environmental pathogens b. Low resistance of the fish stock c. Unsatisfact
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