Radionuclides can bioaccumulate in the bodies of aquatic creatures, albeit to trace amounts in the surrounding water. Due of its importance as a fishing destination in South India, the current study is being conducted in the Pazhaverkadu lagoon. For 20 distinct edible fish species, the average fish bone gross alpha and beta activity were 13.25 Bq/kg and 33.10 Bq/kg. The mean values of gross alpha and gross beta activity of fish muscle were 21.98 and 63.56 Bq/kg respectively. Using the alpha and beta emitters, the Annual Effective Dose Equivalent (AED) of 0.52 mSv/y was calculated
this value is below the recommended limit. The mean values of the radiological risk metrics Excessive lifetime cancer risk (ELCR) and Annual Gonadal Dose Equivalent (AGDE) are 0.002 μSv/y and 0.22 μSv/y, respectively. The bioaccumulation of