密线刺尾鱼 Acanthurus nubilus mì xiàn cì wěi yú

密线刺尾鱼，Acanthurus nubilus体呈椭圆形而侧扁。头小，头背部轮廓不特别凸出。口小，端位，上下颌各具一列扁平齿，齿固定不可动，齿缘具缺刻。背鳍及臀鳍硬棘尖锐，分别具VI-VII棘及III棘，各鳍条皆不延长；胸鳍近三角形；尾鳍近截形或内凹，成鱼时上下叶延长如丝。体蓝灰色，头部及体前部密布黄褐色斑点，体侧后半则形成纵纹。

百度翻译提供：

Acanthurus nubilus has an oval body and flat sides. The head is small and the back contour of the head is not particularly protruding. The mouth is small, the end position, the upper and lower jaw have a row of flat teeth, the teeth are fixed and immovable, and the tooth margin has notches. Dorsal fin and gluteal fin hard spines are sharp, with VI-VII spines and III spines respectively, and each fin ray is not prolonged; Pectoral fins nearly triangular; The caudal fin is nearly truncated or concave, and the upper and lower leaves extend like silk when the fish is adult. The body is blue gray, with yellowish brown spots on the head and front of the body, and longitudinal lines on the back half of the side of the body.