The Charlotte Harbor Estuary

Abstract

Charlotte Harbor is one of the most productive shark nurseries on the Gulf coast — a function not of accident but of its plumbing: the rivers that feed it, the tidal exchange through Boca Grande Pass, and the salinity gradient that follows. This field whitepaper treats the system's two defining predators separately because their physiology demands it — the euryhaline, resilient bull shark against the fragile, obligate-ram-ventilating great hammerhead — and builds out the habitat science, seasonal and tidal patterns, and the evidence-based release protocols that decide whether a released fish actually survives. The throughline is that catch-and-release mortality is set by angler behavior, not gear, and that a disciplined angling community is the most effective stewardship force the estuary has.