| Summary: | Mercury (Hg) and its derivative compounds have been parts of widespread pollutants of the aquatic environment. Since Hg is absorbed by fish and passed up the food chain to other fish-eating species, it does not only affect aquatic ecosystems but also humans through bioaccumulation. Thus, the knowledge of toxicological effects of Hg on fish has become one of the aims in research applied to fish aquaculture. Moreover, the use of alternative methods to animal testing has gained great interest in the field of Toxicology. This review addresses the systemic pathophysiology of individual organ systems associated with Hg poisoning on fish. Such data are extremely useful to the scientific community and public officials involved in health risk assessment and management of environmental contaminants as a guide to the best course of action to restore ecosystems and, in turn, to preserve human health.
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