Galveston's harbor has served as the Gulf Coast's busiest cotton port, a pirate haven under Jean Lafitte, and the entry point for more than 133,000 immigrants between 1846 and 1948. The waters surrounding the island carry centuries of maritime history, from blockade runners threading through Union lines during the Civil War to the construction of granite jetties that tamed the shifting sandbars and opened deep-water commerce to the port. Today, the bay remains a working waterway where shrimp trawlers share the channel with container ships, pelicans dive for mullet, and pods of Atlantic bottlenose dolphins hunt in the tidal flats. Galveston boat tours depart from Pier 21, the restored wharf district where sailing packets once loaded bales bound for Liverpool and New Orleans. The harbor tour route traces the ship channel past the Texas Seaport Museum, under the causeway bridge that carries Interstate 45 across the bay, and along the eastern tip of Galveston Island where Fort San Jacinto guarded the entrance for more than a century. Narration covers the Great Storm of 1900, which destroyed much of the original port infrastructure, and the subsequent construction of the seawall that redefined the island's relationship with the Gulf. Dolphin-watching excursions head into the shallower waters of West Bay and the Bolivar Roads channel, where bottle-nosed dolphins feed on the abundant bait fish drawn to the warm, brackish mixing zones. The boats themselves range from climate-controlled harbor cruisers holding sixty passengers to smaller open-deck vessels designed for sunset sails and specialized tours. Evening departures capture the industrial silhouette of the Port of Galveston against the western sky, while daytime excursions offer clearer views of the Elissa, a three-masted iron barque built in 1877 and still afloat at the museum dock. Kayak tours launch from the same pier, threading through the quieter backwaters where egrets stalk the marsh grass and the city's skyline recedes behind the dunes. Each route depends on tidal flow, wind direction, and the seasonal movements of marine life, making no two departures identical even along the same course.