OBIS-USA is a one-stop source for biogeographic data collected from U.S. waters and oceanic regions-the Arctic, the Atlantic and Pacific oceans, the Caribbean Sea, the Gulf of Mexico, and the Great Lakes. It provides access to highly distributed data sets from a multitude of partners DOCUMENTing where and when species were observed or collected. The site allows one to examine each data set to assess its applicability for a variety of uses. Current functionality allows the user to view the data and FGDC compliant metadata as well as to view geographic, temporal or spatial extent; the taxonomic depth and richness.