Marine protected areas (MPAs) in the United States exist to preserve our nation’s marine resources for this and future generations. About 26 percent of US marine waters are protected in some kind of MPA, defined ... as “any area of the marine environment that has been reserved by federal, state, territorial, tribal, or local laws or regulations to provide lasting protection for part or all of the natural and cultural resources therein.” A few MPAs known as marine reserves or no-take MPAs (amounting to about 3 percent of US waters) do not allow hunting, fishing, or collecting. The purpose of these no-take MPAs, which include marine national monuments, is to sustain fisheries and allow ecosystems to recover from environmental stressors.