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Body deeply compressed with high hump-head in adult males; beaked
mouth; large scales; caudal fin emarginarte. Dark grey in juveniles; greenish
daerk blue in adults, with pale nape and chin. Attains 1.5 m.
ระบบนิเวศ :
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Carnivorous, coral branches and shellfishes. Marine, offshore coral reefs
and islands. Overfishing.