Polycyclic aromatic hydrocarbons (PAHs) are priority pollutants, containing more than two fused benzene rings. They can be divided into low (2-3 rings) and high (4-6 rings) molecular weight compounds. They are raised by natural as well as anthropogenic activity. Anthropogenic activities are namely pyrogenic (incomplete combustion of fossil fuel, auto mobile, power plant, wastes incinerators) and petrogenic (crude oil and petroleum products like diesel, kerosene, petrol, lubricating oil asphalt). They enter in atmosphere and aquatic ecosystem by industrial, domestic wastes water discharges, agricultural and surface run off. They caused many adverse effects in aquatic ecosystem. They trend to bioaccumulate in fish tissues, led to deteriorate impacts. Fish play a vital role in environment, entertainment, economic and major dietary sources (protein, PUFA, energy, vitamins and minerals). In present investigation, the effects of PAHs on fish were estimated in last twenty one year. Both types of PAHs, (LMW) and (HMW) were accumulated in fish. The most studied organs were muscle, liver/bile, gonads, gills, gall bladder, gut, head, eggs, skeleton and brain. PAHs caused behavioural, developmental and reproductive abnormalities in fish. However many studies have been done of PAHs contamination in fish but it is noticed that skin, eye and gills which are directly exposed organs to the surroundings, need to investigate the impacts of PAHs in these organs. Thus, we should emphasize the prevention and remediation of PAHs in aquatic ecosystem.