Endosulfan exposure inhibits brain AChE activity and impairs swimming performance in adult zebrafish (Danio rerio)

► After 96 h of exposition, fish in the 2.4 μg endosulfan/L group presented a significant decrease in brain AChE activity when compared to the control group. ► Exposure to 2.4 μg endosulfan/L during 96 h also impaired all exploratory parameters evaluated. ► Exposure to 2.4 μg endosulfan/L during 96 h did not compromise animals' performance in the inhibitory avoidance apparatus. ► Our findings provide further evidence of the deleterious effects of endosulfan exposure in the nervous system.