_____________________________________________________________________________________________________ # Scientific Officer; *Corresponding author: Email: iahmed@g.ecc.u-tokyo.ac.jp, iahmed@cvasu.ac.bd; Asian Journal of Fisheries and Aquatic Research 16(3): 36-47, 2022; Article no.AJFAR.84319 ISSN: 2582-3760 Heavy Metal Accumulation among Different Organs of Cultured Rohu and Catla along with Evaluation of Enzymatic Activities in Examined Organs Md Fahad Bin Quader a , Tania Sharmin Fatema b , Maria Al Mazed b,c# , Zannatun Nur Popy b# , Sk Ahmad Al Nahid b , Md Ashraful Islam a and Sk Istiaque Ahmed b* a Department of Applied Chemistry and Chemical Technology, Chattogram Veterinary and Animal Sciences University, Bangladesh. b Department of Fisheries Resource Management, Chattogram Veterinary and Animal Sciences University, Bangladesh. c Bangladesh Fisheries Research Institute (BFRI), Freshwater Station, Mymensingh, Bangladesh. Authors’ contributions This work was carried out in collaboration among all authors. Author SIA designed the experiment and provided all the logistic facilities. Authors MFBQ and TSF carried out the sample preparation and analysis. Authors MAM and ZNP helped them in carrying out the experiment. Author MFBQ wrote the manuscript with data interpretation.Authors SIA, MAI and SAANrevised the manuscript critically for important intellectual content. All authors read and approved the final manuscript. Article Information DOI: 10.9734/AJFAR/2022/v16i330375 Open Peer Review History: This journal follows the Advanced Open Peer Review policy. Identity of the Reviewers, Editor(s) and additional Reviewers, peer review comments, different versions of the manuscript, comments of the editors, etc are available here: https://www.sdiarticle5.com/review-history/84319 Received 29 December 2021 Accepted 01 March 2022 Published 03 March 2022 ABSTRACT Aims: The present study was carried out to determine the concentration of heavy metals and to evaluate whether there are any serious toxic effects of the widely exposed heavy metals namely arsenic (As), lead (Pb) and chromium (Cr) in different tissues of two commercially important cultured fish Rohu (Labeo rohita) and Catla (Gibelion catla) Study Design: The study was designed based on Randomized Block Design (RBD) to avoid all kinds of possible biases as well as for ensuring the representation of different fish farms. Three replications were maintained to deal with the possible errors caused by sampling. Methodology: Lead (Pb), Arsenic (As) and Chromium (Cr) were analyzed in a graphite furnace Original Research Article