One　of　the　most　important　factors　influencing　animal　growth　is　non-genetics,　which　includes　factors　like　nutrition,　management　and　environmental　conditions.　By　consuming　their　prey,　predators　can　directly　affect　their　ecology　and　evolution,　but　they　can　also　have　an　indirect　impact　by　affecting　their　prey＇s　nutrition　and　reproduction.　Preys　used　to　change　their　habitats,　their　foraging　and　vigilance　habits　as　anti-predator　responses.　Cooperation　during　hunting　by　the　predators　develops　significant　fear　in　their　prey　which　indirectly　affects　their　nutrition.　In　this　work,　we　propose　a　two-species　stage-structured　predator-prey　system　where　the　prey　are　classified　into　juvenile　and　mature　prey.　We　assume　that　the　conversion　of　juvenile　prey　to　matured　prey　is　affected　by　the　fear　of　predation　risk.　Non-negativity　and　boundedness　of　the　solutions　are　demonstrated　theoretically.　All　the　biologically　feasible　equilibrium　states　are　determined,　and　their　stabilities　are　analyzed.　The　role　of　various　important　factors,　e.g.　hunting　cooperation　rate,　predation　rate　and　rate　of　fear,　on　the　system　dynamics　is　discussed.　To　visualize　the　dynamical　behavior　of　the　system,　extensive　numerical　experiments　are　performed　by　using　MATLAB　and　MatCont　7.3.　Finally,　the　proposed　model　is　extended　into　a　harvesting　model　under　quadratic　harvesting　strategy　and　the　associated　control　problem　has　been　analyzed　for　optimal　harvesting.　　©　2024　World　Scientific　Publishing　Company.