The centerpiece of the Ocean's Edge Wing, is a 28 feet (8.5 m) high 333,000-US-gallon (1,260,000 l) tank for viewing California coastal marine life. In this tank, the aquarium was the first in the world to grow live California Giant Kelp. Visitors are able to inspect the creatures of the kelp forest at several levels in the building. The largest tank in the aquarium is a 1,200,000-U.S.-gallon (4,500,000 l) tank in the Open Sea galleries (formerly the Outer Bay), which features one of the world's largest single-paned windows. It is one of the few aquariums to hold the ocean sunfish in captivity.