Convict Tangs, Acanthus triostegus, with a variety of corals, including one invaded by Petroglyph Shrimp, Alpheus deuteropus, plus a Slate Pencil Urchin, Heterocentrotus mammillatus, in the reef in the Kapoho Tide Pools (Wai’opae Tidepools Marine Life Conservation District), south of Hilo, Hawaii, USA