As you arrive for a dry landing at Plaza Sur, there will be sea lions of all ages playing in the water, following your inflatable raft and hauling out on a small concrete pier and the shoreline. The pups are inquisitive and adorable. A watchful dominate bull can weigh up to 550 pounds. The colony consists of about 1,000 Galápagos sea lions. This is remarkable given the tiny size of the island. Plaza Sur measures only 32 acres or .05 square miles. Alternative names are South Plaza Island and Isla Plaza Sur.