A partly enclosed coastal body of water in which river water is mixed with seawater is called an estuary. An estuary is thus defined by salinity rather than geography. Many coastal features designated by other names are in fact estuaries (for instance, Chesapeake Bay). Some of the oldest continuous civilizations have flourished in estuarine environments (for example, the Tigris and Euphrates rivers, the Nile delta, and the Ganges delta).
âFederal crimesâ refer specifically to offenses that violate U.S. federal laws. They are investigated by federal law enforcement and prosecuted by United States attorneys in federal courts with federal judges.
In general, federal crimes apply to areas of national interest and affect more than one state. There are many federal agencies that enforce federal crimes. The FBI â Federal Bureau of Investigation â is the primary federal law enforcement agency; in recent years since 9/11 many other agencies have been created. Federal crime prosecution falls under the umbrella of the United States Attorney, as opposed to state crimes, which are prosecuted by a district or state attorney.