The Shedd Aquarium has welcomed two rare Bahamian Rock iguanas into its care. (Courtesy the Shedd Aquarium)The Shedd Aquarium has welcomed two rare Bahamian Rock iguanas into its care. (Courtesy the Shedd Aquarium)The Shedd Aquarium has welcomed two rare Bahamian Rock iguanas into its care. (Courtesy the Shedd Aquarium)The Shedd Aquarium has welcomed two rare Bahamian Rock iguanas into its care. (Courtesy the Shedd Aquarium)The Shedd Aquarium has welcomed two rare Bahamian Rock iguanas into its care. (Courtesy the Shedd Aquarium)CHICAGO (WLS) -- The Shedd Aquarium has welcomed two rare Bahamian Rock iguanas into its care.