The fish species diversity is the most important indicator of health of aquatic environment. A good piscina ecosystem diversity illustrates the equable environment. The present study deals with the variety of fishes in the Junput mangrove area (Biramput to Haripur), East Midnapore district. The Junput mangrove area is located at the northern end of the Bay of Bengal (Latitude- 21°94'04.5"N Longitude- 87°26'59.5"E), West Bengal. The field study was taken for a season of two years and data are collected monthly basis were made from May 2022 to April 2024. The study results of the actual inquiry express the occurrence of 93 species (51 finfishes and 42 shellfishes). 51 finfishes belonging to 44 genera, 34 different family and 18 orders and 42 shellfishes belonging to 26 different genera, 15 different family and 03 orders. Among the rerecorded finfish species, 2 species were Vulnerable (VU), 01 species were Near Threatened (NT), 35 species were Least Concern (LC) while 06 species were Not Evaluated (NE), 07 species were Data Deficient (DD) with 44 genus, 18 orders and 34 families. In the case of recorded shellfish species, 33 species were Not Evaluated (NE), 06 species were Least Concern (LC) and 03 species were Data Deficient (DD) with 26 genus, 03 orders and 15 families. The number of species richness in the order Decapoda were dominated by 39 species followed by Perciformes with 08 species; Clupeiformes with 07 species; Tetradontiformes with 05 species; both Gobiformes and Anguilliformes with 04 species; both Acanthuriformes and Carangiformes with 03 species; Siluriformes, Spariformes, Pleuronectiformes, Mugilliformes, Scombriformes, Aulopiformes and Xiphosurida with 02 species; Myliobactiformes, Cypriniformes, Carcharniformes, Elopiformes, Beloniformes and Stomatopoda with 01 species. Out of 93 finfish and shellfish, 50 were carnivores, 39 were omnivores, and 02 were each herbivores and detritivores.