Furthermore, the Kuroshio current and the mainland coastal current converge here, the upwelling current off Taiwan's eastern rift valley brings up organic salts from the ocean depths, and a seabed valley forms a natural barrier. Under these conditions, many organisms have developed into unique species, and the sea off Ilan contains a cornucopia of marine life.
此外，黑潮與親潮在此交會，由花東縱谷來的湧升流將深海有機鹽翻攪而上，海底又形若凹谷，成為天然屏障，許多物種因此發展成為特有種，宜蘭外海也成為海洋生物豐富的聚寶盆。