The Atlantic bottlenose dolphin population in the waters surrounding Tybee Island numbers between 200 and 300 resident individuals, monitored year-round by researchers at the University of Georgia Marine Extension. These dolphins navigate the tidal creeks, salt marshes, and nearshore channels that connect the Savannah River estuary to the open Atlantic, an environment shaped by twice-daily tides that can shift water levels by eight feet. The cruises that depart from Lazaretto Creek and the back river channels follow routes determined not by fixed itineraries but by tide tables, water temperature, and the seasonal movements of menhaden and mullet schools that draw dolphins into predictable feeding zones. Tybee Island's position at the mouth of the Savannah River creates a nutrient-rich confluence where freshwater runoff meets saltwater currents, supporting a marine food web that sustains not only dolphins but also loggerhead sea turtles, brown pelicans, Atlantic stingrays, and migratory shorebirds. The tybee island dolphin cruise industry emerged in the early 1990s, when commercial fishermen began converting shrimp trawlers and recreational boats into passenger vessels after biologists confirmed that the local dolphin pods exhibited site fidelity, returning to the same feeding grounds across decades. Unlike open-ocean cetacean watching, these tours operate in protected estuarine waters rarely deeper than twenty feet, allowing close observation of dolphin surface behavior, echolocation clicks audible through hull-mounted hydrophones, and cooperative feeding strategies in which multiple animals herd fish against marsh banks. Marine naturalists aboard Tybee Island dolphin tour vessels carry photographic identification catalogs compiled by the Georgia Department of Natural Resources, matching dorsal fin notches and scars to individual dolphins tracked since the 1980s. The most frequently sighted animals include a matriarch known as Notch-7, recognizable by a triangular bite mark near her dorsal ridge, and her three generations of offspring, all documented in peer-reviewed studies on dolphin social structure and acoustic communication. Passengers also encounter the engineering legacy of Fort Pulaski, the pentagonal brick fortification visible across the water, and the skeletal remains of ribbed spartina grass that lines the marsh edges, stabilizing sediment and filtering runoff before it reaches the open sea. Early morning departures and late afternoon tybee island dolphin cruise tickets align with peak feeding activity, when falling tides concentrate baitfish in narrow channels and dolphins work in synchronized pods, their exhalations audible across calm water before dorsal fins break the surface in coordinated arcs.