Place of origin:Central Pacific
Widespread West Pacific, ranging west to Java. Replaced by similar H.kallochroma in Sumatra and Andaman Sea. Protected coastal reef slopes on mixed coral and algae habitats. Males recognised by their grey-looking head when seen in natural light. Body with lined pattern until female stage. Head of males usually grey with blue lines, but Australian males have an inverted pattern of green and orange. Length to 15cm.