Abstract: “The objective of the study is to reveal the seasonal variations in fish, water and sediment collected near seashore of Bay of Bengal with respect to heavy metal contamination. The concentrations of 5 heavy metals (Arsenic (As), Cadmium (Cd), Chromium (Cr), Lead (Pb) and Mercury (Hg)) were determined in water, sediment and marine species Indo-Pacific king mackerel popularly known as Spotted Seer fish (Scomberomorus Guttus) from Pulicat situated in the Northern coast of Tamilnadu (India) in 5 different seasons. The concentration of heavy metals in each sample were determined using Atomic Absorption Spectrophotometer (AAS). Thestudy shows that the concentrations of most of the heavy metals in fish are higher in summer season, water in monsoon season, and sediments in post-monsoon season.”

Keywords: Heavy metals, concentration, Atomic Absorption Spectrophotometer(AAS), Spotted Seer fish, Seasonal variations, Pulicat, sediment, water