Perdido Bay is a substantial coastal lagoon spanning the Alabama-Florida border, approximately 33 miles long and averaging two to three miles wide. It is a relatively shallow water basin, with most of its area averaging only three to five feet deep, dipping to a maximum depth of around 15 feet. The bay is enclosed by barrier islands and connects to the Gulf of Mexico via the Perdido Pass tidal inlet at its southeastern end. Its waters transition from brackish conditions in the northern reaches, influenced by the Perdido River, to higher salinity in the south near the pass. The bay's ecosystem is diverse, featuring extensive seagrass beds that serve as vital spawning and nursery grounds, alongside forested shorelines in its upper segments. This creates a rich inshore and nearshore fishery accessible by a variety of means, from kayaks to larger boats.