Monitor National Marine Sanctuary is the site of the wreck of the USS Monitor, one of the most famous shipwrecks in U.S. history. It was designated as the country's first national marine sanctuary on January 30, 1975, and is one of only two of the thirteen national marine sanctuaries created to protect a cultural resource rather than a natural resource. The sanctuary comprises a column of water in diameter extending from the ocean’s surface to the seabed around the wreck of the Civil War ironclad, which lies south-southeast of Cape Hatteras, North Carolina. Average water depth in the sanctuary is . Since its sinking in 1862, the Monitor has become an artificial reef attracting numerous fish species, including amberjack, black seabass, oyster toadfish and great barracuda.