chemicals alter the quality of water that is a residence of several aquatic animals (Donohue et al., 2006). Exposure of pesticides at acute concentrations had negative effects on organisms and sometimes causes mass mortalities (Sabae et al., 2014).Organo-chlorines and pyrethroid pesticides are commonly applied and overlapped in soy-bean crops (Miglioranza et al., 2003). Both pesticides are known as highly toxic to aquatic animals like fish due to harmful impacts (US EPA, 2002;Gu et al., 2007). Deltamethrin (DM) belongs to pyrethroid insecticides (Tomlin, 2006),