Deltamethrin is a synthetic pyrethroid pesticide that kills insects through dermal contact and digestion. It is applied for a range of commercial crops and recreational uses, and by extension controls a variety of pests. Synthetic pyrethroids, such as deltamethrin, are toxic substances that lead to generation of reactive oxygen species, which harm living organisms. In the present study larvae of zebrafish exposed to 0.4µg/l and higher concentrations of decis showed a less sensitive to touch, reduced movement and in some case paralysis (abnormal touch response) indicating neurotoxicity. Behavioral abnormalities associated with neurotoxicity that resulted from decis include spastic behavior at the lower concentrations and reduced motility and paralysis at the highest concentration.
