Four sympatric Acropora corals, including A. muricata, A. valida, A. hyacinthus, and A. humilis, were studied in the Chinwan Inner Bay, Penghu Islands from 2002 to 2005.

• （三）染色体数目的资料显示青湾内湾轴孔珊瑚并无多倍体或非整倍体的存在，不支持在澎湖青湾海域的四种轴孔珊瑚之间有杂交种存在的可能性。