Water area introduction: There are more than 630 large and small islands in the waters of the Great Barrier Reef, including Green Island, Tanker Island, Magnetic Island, Helen Island, Hamilton Island, Lindemann Island, Lizard Island, Fenser Island, etc. More famous. Some of the islands in the Great Barrier Reef are actually the peaks of mountains submerged in the sea. When viewed from above, they look like green gems blooming on the sea. Now these islands have been opened up as tourist areas, attracting countless tourists every year.