Inshore in 904 water, mangroves live tight to dock pilings, bridge fenders, the Mayport jetty rocks, and any deep ICW structure. They also school nearshore (within 10 miles) on artificial reefs and ledges. Inshore fish tend to be smaller (8-14 inches); offshore mangroves can hit 16-20 inches and 4+ lb.
Reddish-brown body shading to lighter belly, distinctive dark stripe through the eye on younger fish. Florida minimum is 10 inches inshore (no closed season), 12 inches federal Atlantic offshore, daily bag of 5. Schools of 100+ around heavy structure.
Year-round in 904 inshore water. Summer (June-September) is peak activity — warm water makes them aggressive feeders all day. Spring and fall consistent. Winter slows but they're catchable around bridge pilings on warm afternoons. Offshore population peaks in summer with the larger fish.
Light tackle is mandatory — 15-20 lb fluoro leader, 1/0 hook, free-lined live shrimp drifted into the shadow line under a piling or bridge. Don't anchor too close; mangroves spook easily. The strike is sharp and immediate. Set fast and pull them away from structure or you're cut off in two seconds.
Florida fishing regulations change. Always confirm slot, bag limits, and seasons on the official source before you keep anything. See our Licenses & Regulations page or go straight to MyFWC.com.