日本刺尾鱼 Acanthurus japonicus rì běn cì wěi yú

日本刺尾鱼，Acanthurus japonicus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11棘及3棘，各鳍条皆不延长；胸鳍近三角形；尾鳍近截形或内凹。体色一致为黑褐色

百度翻译提供：

Japanese barbed tailed fish, Acanthurus japonicus, 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 11 spines and 3 spines respectively, and each fin ray is not extended; Pectoral fins nearly triangular; The caudal fin is nearly truncated or concave. The body color is black brown