Acanthurus coeruleus, L

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Tropical western Atlantic and Ascension Islands. Stragglers north to New York and south to Rio de Janeiro. Occurs on shallow reefs, ranging to about 25m depth, and swims singly or in small aggregations. Often mixes with schooling Acanthurus chirurgus or A.bahianus. Adult A.coeruleus are bluer, and deeper bodied than the other two species. The peduncular spine is white or yellow. Small juveniles are mostly bright yellow. Length to 35cm.