Acropora humilis

Acropora humilis, also known as Finger coral, is a species of acroporid coral found in the Gulf of Aden, the Red Sea, the northern and southwestern Indian Ocean, Australia, the central Indo-Pacific, Japan, southeast Asia, the East China Sea, the central and western Pacific Ocean, the Johnston Atoll and the northwestern Hawaiian Islands. It also occurs in the Mariana Islands, Palau, and the Pitcairn Islands. Occurring in tropical shallow reefs on upper reef flats and slopes at depths of up to 5 metres (16 ft), it was described by Dana in 1846.