Blackspot Surgeonfish

Body brown; a round black spot at upper gill opening; dark blue line just below the bases of dorsal and anal fins. Dorsal fin with soft part having longer base than spinous part. Minute scales. Gill rakers in anterior row 19-23, posterior 22-24. A dark brown area surrounding the caudal spine. Large males develop highly convex foreheads that extend beyond the mouth (Ref. 1602).Description: Characterized further by having orange rim around eye; distinctive dark spot behind eye; orange bar just behind rear margin of head; dorsal fin, orange; upper and lower margins on caudal fin, pale; caudal spine with length about 2.0 in head length; greatest depth of body 1.9-2.0 in SL (Ref. 90102).

Dorsal spines (total): 9; Dorsal soft rays (total): 26 - 28; Analspines: 3; Analsoft rays: 25 - 26

Occurs in clear seaward reef slopes, below 15 m, usually below 30 m (Ref. 9710). Adults mainly on deep coastal reef slopes and outer reef walls (Ref. 48637). Found singly or in pairs (Ref. 9710). Feeds on algal film on bare rocks (Ref. 9710). Juveniles found in shallow protected reefs, usually between soft coral, in 0.2-3 m depth (Ref. 9710).

fisheries: commercial; aquarium: commercial

分布於印度-西太平洋區，自馬爾地夫至西太平洋。台灣分布於東北部、東部、南部、澎湖、小琉球、綠島及蘭嶼等。

一般以流刺網、一支釣、延繩釣或潛水鏢魚法等捕獲。觀賞及食用兼具。剝皮後，煮薑絲湯，肉質鮮美。尾柄上骨質盾板非常銳利，易傷人，處理時需小心。

體呈橢圓形而側扁。頭小，頭背部輪廓明顯凸出，成魚越是明顯。口小，端位，上下頜各具一列扁平齒，齒固定不可動，齒緣具缺刻。背鰭及臀鰭硬棘尖銳，分別具XI棘及III棘，各鰭條皆不延長；胸鰭近三角形；尾鰭彎月形，隨著成長，上下葉逐漸延長。體一致為黃褐至暗褐色，具許多不顯的灰藍色波狀縱線；在鰓蓋的上緣，緊接著眼睛後方，具一稍大於瞳孔之黑色圓斑；圓斑的後方，由鰓蓋上緣至胸鰭基部上方，具一條橙色之橫帶。背鰭橘黃色外，背鰭及臀鰭的基底及鰭緣各具一暗藍色紋，鰭緣的上下方另具數條細的藍色縱線；尾鰭基部有一白橫帶，上下葉則呈橘黃色；尾柄棘溝黑色。

主要棲息於清澈而面海的礁區斜坡，棲息深度一般在15公尺以下，有時可達30公尺以下，單獨或成對出現。幼魚則活動於水淺且有遮蔽的礁區，通常是在軟珊瑚之間，深度在0-3公尺處。以裸露礁石上的藻類為食。

Acanthurus bariene is a tropical fish also commonly known as the bariene surgeonfish, black-spot surgeonfish, or eye-spot surgeonfish. It was first named by René Primevère Lesson in 1831.

Occurs in clear seaward reefs to a depth of at least 30 m.