en Stock assessment Stock assessment كاربردي Orginal research papers Length-weight and length-length relationships were estimated for eight species occurring in the Hara Biosphere Reserve in the Persian Gulf. Specimens were collected quarterly by block net and drift gillnet from June 2017 to July 2018. &nbsp;The <em>b</em>-values for length&ndash;weight relationships varied from 2.693 to 3.321. The study represents the first published information on LWRs for <em>Hemiramphus archipelagicus</em> (Collette & Parin, 1978), <em>Lagocephalus guentheri </em>(Miranda Ribeiro, 1915), and <em>Triacanthus biaculeatus</em> (<a href="https://en.wikipedia.org/wiki/Marcus_Elieser_Bloch" title="Marcus Elieser Bloch">Bloch</a>, 1786) and first-time reports for FishBase. These species are ranked as rare in the&nbsp;sense that they have a restricted range. Length-weight relationship, Fish, Mangrove 292 297 http://jifro.ir/browse.php?a_code=A-10-3412-1&slc_lang=en&sid=1 A. Taheri Mirghaed mirghaed@ut.ac.ir 100319475328460039237 100319475328460039237 Yes 1Department of Aquatic Animal Health, Faculty of Veterinary Medicine, University of Tehran, Tehran, 1419963111, Iran. M. Ghodrati Shojaei mshojaei@modares.ac.ir 100319475328460039238 100319475328460039238 No Department of Marine Biology, Faculty of Marine Science, Tarbiat Modares University, 46414-356, Noor, Iran. S.A. Taghavi Motlagh s_taghavimotlag@hotmail.com 100319475328460039239 100319475328460039239 No Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension, Organization, Tehran, Iran M. Mashhadi Farahani 100319475328460039240 100319475328460039240 No Department of Marine Biology, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, 4641776489, Noor, Iran. M. Weight 100319475328460039241 100319475328460039241 No Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research