Looking toward the direction of Mati Bridge from the north tip of Dabaisha, you can see a reef emerging from the sea. It is Dabaisha No. 1 Independent Reef, which is the Whale Reef called by fishermen on Green Island. There are No. 2 to No. 5 reefs in that order offshore. However, No. 1 reef is the closest to the shore. Additionally, it is surrounded by stable waves and currents, and crystal clear water, so it is the most accessible reef among the five for novice divers.