These are common in seaward reef surge channel caves. Maximum size is reported to be about 25cm.
In large individuals, the teeth are visible even with the mouth closed.
Young individuals have a yellowish face and a spot on the caudal peduncle that fades with age.
The fish below photographed on the Kwajalein seaward reef by Stan Jazwinski appears to be a very young individual. As it grows, the body develops additional longitudinal lines and the black spot on the caudal peduncle fades out.
Created 12 December 2017
Updated 27 March 2018
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