Welcome to the Nonindigenous Aquatic Species (NAS) information resource for the United
States Geological Survey. Located at Gainesville, Florida, this site
has been established as a central repository for spatially referenced
biogeographic accounts of introduced aquatic species. The program provides scientific
reports, online/realtime queries, spatial data sets, regional contact lists, and general
information. The data are made available for use by biologists, interagency groups, and the
general public. The geographical coverage is the United States.