Galveston Bay is the second-busiest port in the nation by overall tonnage. Other major ports utilizing the bay include the Port of Texas City and the Port of Galveston. With its diverse marine life, Galveston Bay also produces more seafood than any bay in the nation except the Chesapeake. The Gulf Coast gained its present configuration during the most recent glacial period approximately 18 ka (thousands of years ago). Low global sea levels allowed the Texas mainland to extend significantly further south than it is presently, and the Trinity River had carved a deep canyon through present-day Bolivar Roads on its way
Port of Galveston opened at the port. This was the result of a public-private partnership that the port entered into with Wallenius Wilhelmsen Logistics Vehicle Services Americas. The new site has the capacity to import 32,500 cars per year, an inventory worth more than $1.3 billion. As of 2017, Galveston is the 4th-busiest cruise ship homeport in North America and one of the top 10 homeports in the world. Over the years, the port has welcomed ships from major cruise lines including Carnival Cruise Lines, Royal Caribbean Cruise Lines, Princess Cruises, Disney Cruise Lines, and Norwegian Cruise Lines. In 2017, three Carnival ships