The Cayman Islands are a British Overseas Territory consisting of 3 islands in the western Caribbean Sea. Grand Cayman, the largest island, is known for its beach resorts and varied scuba diving and snorkeling sites. Cayman Brac is popular for deep-sea fishing of tuna, marlin and barracuda. Little Cayman, the smallest island, is home to diverse wildlife, from rock iguanas to red-footed boobies.