Twelve species of Ophiuroid intertidal zone in Xiamen Harbour arc identified, which belong to 7 genera, 5 families, and 3 ordeis. Amphioplus depressus, Amphioplus impressus, Amphiura vadicola and ophionereis dubia sinensis are dominant species on muddy beach, sand-muddy beach, sandy beach and rocky shore,resprecti-vely. Among four types of intcrtidal bottoms,the quantity of Ophiuroid is the largest on muddy beach, the second on sand muddy beach,the third on rocky shore and the smallest on sandy beach. The s...