Crescent Damsel

Description: Indonesian fish metallic green to black with a distinctive white spot at end on dorsal fin base (Ref. 48636). Ear spot black. Caudal fin yellow, margin blackish. Sumatran variant has white caudal fin and has no tinge of yellow (Ref. 90102).

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).

Dorsal spines (total): 13; Dorsal soft rays (total): 11 - 12; Analspines: 2; Analsoft rays: 11 - 12

Occurs inshore (Ref. 75154). Diurnal species (Ref. 113699).

Adults inhabit inshore and offshore coral reefs; also in harbors and protected outer reef slopes and current prone habitats. Form schools in harbors in depths from near surface to about 25 m (Ref. 48636). 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). Diurnal species (Ref. 113699).

fisheries: of no interest

分布於印度-西太平洋區，由紅海及東非到澳洲北部與美拉尼西亞 (除了斐濟以外)， 北至日本南部、琉球群島、台灣與菲律賓等。台灣分布於南部、北部、東北部、西南部、澎湖及小琉球等沿岸礁區。

小型之雀鯛，無食用價值。有人將其作觀賞魚之用。

體呈橢圓形而側扁，標準體長為體高之2.2-2.6倍。吻短而鈍圓。口中型；兩頜齒兩列，小而呈圓錐狀。眶前骨具鱗，眶下骨具鱗，下緣平滑；前鰓蓋骨後緣多少呈鋸齒。體被櫛鱗；鼻部具鱗；側線之有孔鱗片17-18個。鰓耙數22-24。背鰭單一，軟條部略延長而呈尖形，硬棘XIII，軟條11-12；臀鰭硬棘II，軟條11-12；胸鰭鰭條17；尾鰭深叉形，上下葉末端延長呈絲狀。體呈金屬綠至黑色；鰓蓋上緣近側線處具一大黑點。背、臀鰭後半部有時為淡白至黃色，通常僅在背鰭基底末端具一個白色斑點；胸鰭透明，基底上緣具一小黑點；尾鰭基部暗褐色，且延伸至上下葉之外緣，中間部分則為淡白至黃色。

主要棲息於岸邊與外海的珊瑚礁區，亦可在港灣或有遮蔽的外礁斜坡與水流向下的水域發現。在港灣中會形成魚群，棲息深度從接近表面到大約 25 公尺左右。

Neopomacentrus cyanomos, commonly known as the regal demoiselle, is a fish native to the Indo-Pacific region from the Persian Gulf, the Red Sea and the coastal waters of east Africa east to the Philippines, north to southern Japan, south to northern Australia and Melanesia. It has also been found as an invasive species in the Gulf of Mexico, off the Yucatan Peninsula, although how they arrived there is unknown.

Inhabits inshore and offshore coral reefs. Also, occurs in harbors and protected outer reef slopes.