Environmental contamination from the use of pesticide ranges from water, air and soil pollution to alteration of the ecosystem resulting in detrimental effects to non-target organisms. Fipronil 5%SC one of the broad spectrum insecticide belongs to the phenylpyrazole chemical family. Fipronil's specificity towards insects is believed to due to its greater affinity to the GABA receptor in insects relative to mammals and its effect on glutamate-gated chloride (GluCl) channels, which do not exist in mammals. Because of its effectiveness on a large number of pests, Fipronil is used as the active ingredient in flea control products for pets and home roach traps as well as field pest control for corn, golf courses, and commercial turf. Its widespread use makes its specific effects the subject of considerable attention. The aim of the present study was to assess the effect of fipronilpesticide on common carp (Catla catla) for the 96-h LC50 value was found 0.23mg/l, observed the behavioural studies.
