Blacksaddle Triplefin

Eggs are hemispherical and covered with numerous sticky threads that anchor them in the algae on the nesting sites (Ref. 240). Larvae are planktonic which occur primarily in shallow, nearshore waters (Ref. 94114).

分布於西北太平洋區，包括日本、台灣與香港。台灣產於北部、東北部及澎湖等。

小型魚類，僅具學術研究價值。

體形小，圓柱狀。上頜向後延伸至眼前半部下方；上下頜齒小，外列齒較大；鋤骨及腭骨均具齒；眼眶上緣皮膜與鼻瓣膜均細長，無鋸齒緣。頤部感覺孔 4+1+4。頭、頸、腹部及胸鰭基無鱗，其餘被櫛鱗；背鰭與臀鰭基均具鱗；腹部後緣圓鱗數較多，約 2-6列；側線不連續，分為前後二段，前段側線為孔鱗，孔鱗側線不陡降，末端位於第二背鰭最後一棘下方；後段側線為缺刻鱗，缺刻側線鱗從孔鱗側線末端起延伸至尾柄；最後孔鱗與缺刻側線鱗列之間具一鱗列；側線上鱗列 3-4。D. III+XIII-XIV(XIII)+9-10(10)；A. I+19-20(19)；P. ii-iii+4-8+vi-vii(iii+6+vii)； L.l. 17-19+16-19；背鰭分成三枚；胸鰭末端達第十五至第十六側線孔鱗。體橫帶不可分辨，體一致為紅色或褐色，具許多白斑；頭與體顏色同亦具白斑；頭腹部較其它種類色深，鰓被架膜灰色，均具白斑；胸鰭基無大塊深色斑。以前所記載之孝真雙線鳚(/Enneapterygius hsiojenae/)及白點雙線鳚(/Enneapterygius leucopunctatus/)為本種之同種異名

主要棲息於潮間帶至水深約11公尺的岩石區。以藻類為食。

Enneapterygius vexillarius, the blacksaddle triplefin, is a species of triplefin blenny in the genus Enneapterygius. It was described by Henry Weed Fowler in 1946. Enneapterygius vexillarius has been recorded from the Ryukyu Islands, Taiwan and Hong Kong.