This review article focuses on the effect of pesticides on reproductive functions, haematological and biochemical changes in catfishes. Pesticides are chemical substances that are released into the environment to control the populations of harmful pests. Pesticide exposure leads to toxicity in aquatic organisms, including fishes which are particularly sensitive to pesticides. The acute and sublethal concentrations of pesticides in the aquatic environment result in different lethal alterations, including changes in reproductive functions, histology, haematology, proteins, glucose, lipids, enzymes, etc. Pesticides act as endocrine disruptor compounds and have the potential to impair reproductive function in catfishes. Alterations in haematological and biochemical parameters are used as efficient biomarkers in assessing the toxicity of pesticides in fishes.