According to a 1999 report from Shao Kwang-tsao and Cheng Ming-hsiu, due to the presence of the Kuroshio Current flowing through the Kueishan Island marine area, there are over 300 fish species and about 60 types of coral reef on the sea floor. The survival rate of the reefs is between 30 % and 90 %.
根據邵廣昭與鄭明修於 1999 年的調查，龜山島為黑潮所經要道，光是魚種就超過 300 種，海底還有範圍較小的珊瑚礁區，約 60 種，覆蓋率（指珊瑚礁的存活程度）在 30 % 到 90 % 之間。