FISH DISEASE
Environment has a major influence on virtually every important disease affecting cultured fish and thus it is only appropriate that a treatise on fish diseases include a discussion of culture systems.The following four major types of systems are used to culture fish :aquaria,ponds,ceges,raceways.This dictates the fish density that can be kept in each system,unless the culturist provides additional life-support systems.(FISH DISEASE-Chapter 2 .Types of Culture Systems) Severum cichlid infected by lymphocystis on the dorsal fin(arrow). Atlantic croaker with a severe lymphocystis infection.The redding (hemorrhage ) suggests that this lesion may be secondarily infected by bacteria.