Nagasaki Damsel

Description: Overall grey, scale margins black, head lines and spots blue, dorsal spines tips black, pectoral fin base spot black large, caudal fin white or grey with stripes wavy. Body depth 1.9-2.2 in SL (Ref. 90102).

Courtship behavior during breeding includes signal jumps, enticement, chasing and skimming (Ref. 59303).

Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.

Dorsal spines (total): 13; Dorsal soft rays (total): 15 - 16; Analspines: 2; Analsoft rays: 15 - 16

Occurs inshore (Ref. 75154). Diurnal species (Ref. 54980; 113699).

Adults are found in sandy areas of both lagoon and seaward reefs. They occur in small groups with outcrops of soft coral patches or gorgonians, usually in depths over 20 m (Ref. 48636). Feed primarily on zooplankton. Oviparous, males guard the nest (Ref. 59303). Eggs are demersal and adhere to the substrate (Ref. 205). Diurnal species (Ref. 54980; 113699).

aquarium: commercial

分布於印度-西太平洋區，由馬爾地夫與斯里蘭卡至萬那杜，北至日本南部，南至澳洲西北部與新加勒多尼亞。台灣發現於東部、南部、小琉球、澎湖及蘭嶼等地。

本身體色豔麗，是受歡迎之水族觀賞魚。

體呈橢圓形而側扁，標準體長為體高之1.9-2.1倍。吻短而鈍圓。口中型；頜齒兩列，小而呈圓錐狀。眶下骨裸出，下緣具鋸齒，眶前骨與眶下骨間具缺刻；前鰓蓋骨後緣具鋸齒。體被櫛鱗；鼻部具鱗；側線之有孔鱗片17-19個。背鰭單一，軟條部不延長而略呈尖形，硬棘XIII，軟條14-15；臀鰭硬棘II，軟條15-17；胸鰭鰭條17-19；尾鰭叉形，上下葉末端呈尖狀。體呈淡灰色至暗灰色或暗褐色；頭部具許多藍紋及藍點；鱗片通常具有垂直的藍線。背、臀暗色；胸鰭淡色，基部上半部具一黑斑；尾鰭白色至淡灰褐色；背、臀及尾鰭另具數條淡色線紋，或有不顯。背鰭後方具眼斑，大成魚消失。

主要棲息於潟湖與臨海礁石區的沙地。經常在軟珊瑚區塊或者柳珊瑚的露頭上形成小群魚群，棲息深度通常超過 20 公尺。主要以浮游動物為食。