Chlorurus Pyrrhurus

This species is further distinguished by having the following characters: median predorsal scales 4; scale rows on cheek 2; conical teeth absent on side of lower dental plate, 0-2 on upper plate of initial phase and often 2 on terminal male; lips slightly covers the dental plates; caudal fin in subadult slightly rounded to truncate and slightly emarginate in terminal male. Colour of male distinctly bicolored, with purple-brown anterior, and oblique division to pale yellow posterior; female entirely dark brown with red-orange tail (Ref. 9793, 90102).

Iridovirosis. Viral diseases

Oviparous, distinct pairing during breeding (Ref. 205).

Dorsal spines (total): 9; Dorsal soft rays (total): 10; Analspines: 3; Analsoft rays: 9

Inhabits seaward coral and rocky reefs. Feeds on benthic algae (Ref. 9710).

Inhabits seaward coral (Ref. 58652) and rocky reefs (Ref. 9710); inner reefs with rich coral habitat (Ref. 48636). Feeds on benthic algae (Ref. 3488). May occur in small groups of 1 TP with 1 to 3 IPs (Ref. 9793). Caught mainly with traps, nets and other types of artisanal gear. Minimum depth reported from Ref. 90102.

fisheries: commercial; aquarium: commercial

分布於太平洋區，由琉球群島至澳洲，以及東加。台灣產於西部、南部及澎湖等沿岸。

主要捕獲的漁法是延繩釣、一支釣、流刺網及籠具等，而本種魚亦是潛水鏢魚的對象以及水族館展示魚種。

體延長而略側扁。頭部輪廓呈平滑的弧型。後鼻孔並不明顯的大於前鼻孔。齒板之外表面平滑，上齒板不完全被上唇所覆蓋；每一上咽骨具1列臼齒狀之咽頭齒。背鰭前中線鱗約4；頰鱗2列，上列為4鱗；下列為4-5鱗。胸鰭具15軟條；尾鰭於幼魚時圓形，成體為稍圓形到截形。初期階段(IP, Initial phase)的雌魚體色，頭部、體側、背鰭、臀鰭及胸鰭皆一致為褐色，無任何顯著之斑紋；尾鰭則為一致之橘紅至深紅色。終期階段(TP, Terminal phase)的體色，頰部及體側後大半部為黃色，除頰部外之頭部、尾柄部、背鰭、臀鰭及尾鰭為藍綠色，後頸部向下延伸至臀鰭基底前方之腹面為暗色；眼部具藍色輻射紋，前向之輻射紋延伸至嘴角；鱗片具橘黃色短橫紋或斑點；背及臀鰭另具一寬的橘黃縱帶；胸鰭暗色而具藍緣。以前所記載之紅尾鸚哥魚(/S. pyrrhurus/)為本種之誤鑑。

主要棲息於臨海的珊瑚礁與岩礁區，通常活動於珊瑚豐富的岩礁內側。以底藻為食。