There are over 25,000 identified species of fish on the earth, but there may be over 15,000 fish species that have not yet been identified.  

U.S. Department of the Interior

March 25, 2011 | Categories: Resources

The U.S. Department of the Interior is a Cabinet-level agency that manages America’s vast natural and cultural resources. Secretary of Interior Ken Salazar heads our department, which employs 70,000 people, including expert scientists and resource-management professionals in eight technical bureaus.