The waters and islands in the protected area are home to more than 120 species of coral and 520 species of fish, some new to science. The area also has some of the most important sea bird nesting sites in the Pacific, large fish populations and sea turtles, the aquarium and Conservation International say.
"The new boundary includes extensive seamount and deep-sea habitat, tuna spawning grounds and as yet unsurveyed submerged reef systems," Greg Stone, the New England Aquarium's vice-president of global marine programs, told the Reuters news agency.
If you want to see more, National Geographic has a great website devoted to the Phoenix Islands, with photos like this one, and other resources.
It's a wonderful day when any new protected area is created, especially one larger than either the Northwest Hawaiian Islands National Monument (largest in U.S. waters) or the Great Barrier Reef Marine Park Authority in Australia.