Off the tourism-filled coast of Hawaii, President Obama is creating the world's largest marine-protected area.
The Papahanaumokuakea Marine National Monument was originally designated by President Bush in 2006, but will now quadruple in size to be twice that of Texas.
Commercial fishing and mining within the preserve are still not allowed.
A map of Hawaii's Papahanaumokuakea Marine National Monument.
Scientific research and the removal of fish for Native Hawaiian cultural practices will be allowed. People will also be permitted to recreationally fish if they have a permit.
Some fishing groups have voiced concern over how the protected area would impact their industry. Fishing is an important part of the Hawaiian economy and a significant source for local fish markets.
With this latest announcement, Obama will have created, or expanded, 26 national monuments.
Hawaii Sen. Mazie Hirono comes out in support of President Obama’s expansion of the Papahanaumokuakea Marine National Monument.— Andrew Pereira (@AP_Honolulu) August 26, 2016
The Associated Press contributed to this report.