Initial phase very variable in coloration. Small individuals may be uniformly dark brown to light gray with or without the dark-centered light area on the caudal peduncle; large individuals may have a series of irregular rows of small light spots posteriorly or have the dark-centered light area on the caudal peduncle. The terminal phase is also variable with or without a large tan area on the side or on the caudal peduncle. Rounded snout (Ref. 48636).
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Myers, R.F. 1991 Micronesian reef fishes. Second Ed. Coral Graphics, Barrigada, Guam. 298 p. (Ref. 1602)
http://www.fishbase.org/references/FBRefSummary.php?id=1602&speccode=4306
