The Kuroshio current allows the ocean water around Green Island to be above 20 ℃ all year long. And because the water is clear here, stony coral and soft coral groups abound, with high rates of ground over. The current also brings many tropical and sub-tropical fish here, creating a vibrant coral ecology.
黑潮使得綠島周圍的海域水溫終年維持在攝氏二十度以上，由於水質清澈，石珊瑚和軟珊瑚在這塊海域茂密生長，覆蓋率相當高；黑潮也帶來許多熱帶和亞熱帶的海洋生物在此定居棲息，構成繁茂的珊瑚礁生態系。