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Indo-Pacific: Ryukyu Islands, encompassing the Indo-Malayan Archipelago, Western Australia north of Abrolhos Islands; reaching eastward along the northern margin of the tropical Indian Ocean to Sri Lanka and India. 印度-太平洋: 琉球群島, 包含印度-馬來列島， Abrolhos 島西澳大利亞北方; 向東達到沿著熱帶印度洋到斯里蘭卡與印度的北方邊緣。
大小 / 重量 / 年齡
成熟度: Lm? range ? - ? cm Max length : 12.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 7247)
背棘 (總數) : 13; 背的軟條 (總數) : 14 - 16; 臀棘: 2; 臀鰭軟條: 12 - 14. Diagnosis: Body and median fins generally brown to nearly black; body paler ventrally; fins grading to smoky gray distally. Margin of scales on sides with blackish streak, appearing as series of transverse bands; few small blue spots scattered on head and sides. Pelvic and anal fins bright blue anteriorly. Lips dusky brown (Ref. 510). Body depth 1.7-2.2 in SL (Ref. 90102). Body shape (shape guide): short and / or deep; Cross section: compressed. 身體與中央的鰭通常褐色到幾乎黑色; 身體腹側灰白的; 鰭漸層色到煙灰色的末梢部地。 在側邊上的鱗片的邊緣有黑色的條紋, 呈現成列的橫紋; 少數小的藍色斑點散佈在頭部與側邊上。 腹鰭與臀鰭淡藍色前面地。 形態上近似 S. fasciolatus ，但是 S. obreptus 在眶下骨與前鰓蓋骨邊緣上有發展良好的鋸齒, 在後部輪廓軟的背部更尖和更有角的, 與它棲息地不同。 唇暗褐色的。
Adults occur close to shore in rocky or dead reef areas where visibility is often reduced due to silting and wave action. Territorial, they maintain and 'weed' filamentous algae patches growing on dead coral (Ref. 9710). Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).
Oviparous, distinct pairing during breeding (Ref. 205). Eggs are demersal and adhere to the substrate (Ref. 205). Males guard and aerate the eggs (Ref. 205).印度-太平洋: 琉球群島, 包含印度-馬來列島， Abrolhos 島西澳大利亞北方; 向東達到沿著熱帶印度洋到斯里蘭卡與印度的北方邊緣。
Allen, G.R. and A.R. Emery, 1985. A review of the Pomacentrid fishes of the genus Stegastes from the Indo-Pacific, with descriptions of two new species. Indo-Pac. Fish. (3):31. (Ref. 510)
