According to literature, the arsenic contents of freshwater fish from arsenic-contaminated and non-contaminated sites reported high arsenic concentrations and significant amounts of inorganic arsenic in the edible muscle tissues. The data suggested that freshwater fish may represent a significant source of inorganic arsenic to human populations (Jankong et al., 2007). Freshwater fishes from a polluted river in Spain contained mainly inorganic arsenic and lower amounts of AsB and arsenosugars (Devesa et al., 2002).