The Gulf of Mexico (GOM) is the primary producer of shrimp in the United States and annual production from this region has remained relatively constant over the past several decades. By comparison, U.S. shrimp imports have increased from about 400 million pounds annually during the early 1990s to more than 1 billion pounds in recent years. These imports arrive in a variety of product forms including shell-on, peeled, and miscellaneous (primarily breaded). Using a Mixed-Rotterdam model, this study investigates the influence of changes in imports in total and by product form on the GOM dockside price as well as the influence of expenditures on imports and domestic product. Quarterly data covering 1991 though 2011 was employed. Overall, results conform to theoretical expectations.