Has a distinctive prominent preopercular spine that extends across the head-bar. Juveniles and males bright red, females become maroon to nearly black (Ref. 37816). Males are much smaller than females (Ref. 48636).
- Allen, G.R. 1975 Damselfishes of the South Seas. T.F.H. Publications, Inc., Neptune City, New Jersey. 240 p. (Ref. 4966) http://www.fishbase.org/references/FBRefSummary.php?id=4966&speccode=6652
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