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群体高约65厘米，基部呈石化坚硬块状，固着于岩石。中轴分节，主干圆柱状；树状分枝，趋向形成一个扇形。末端珊瑚枝细长而稀疏。水螅体在珊瑚枝四周均匀分布，收缩后在皮层上留下一个一个小孔。中轴分节。皮层厚度0.6～0.8毫米，骨针无色，以长腰双球型骨针为主。[1]
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