粗棘鼻鱼 Naso brachycentron cū jí bí yú

粗棘鼻鱼，【Naso brachycentron】体呈长椭圆形而侧扁；尾柄部有二个盾状骨板，各有一个龙骨突。头小，随着成长，雄鱼在眼前方之额部逐渐突出而形成短而钝圆之角状突起，角状突起与吻部呈45°角，雌鱼则无；雌雄鱼则皆随着成长而于背部隆起一个突起。口小，端位，上下颌各具一列齿，齿稍侧扁且尖锐，两侧或有锯状齿。背鳍及臀鳍硬棘尖锐，分别具IV-V棘及II棘，各鳍条皆不延长；尾鳍截平，上下叶缘延长如丝。体呈橄榄色至暗褐色，鳃膜白色，体侧无任何斑纹；背鳍与臀鳍软条部及尾鳍周边均具白缘。

百度翻译提供：

[naso brachycentron] has a long oval body and flat sides; There are two shield bone plates at the tail handle, each with a keel process. The head is small. As it grows, the male fish gradually protrudes from the forehead in front of his eyes to form a short and blunt angular protrusion. The angular protrusion has a 45 ° angle with the snout, while the female fish has no; Both male and female fish have a protrusion on their back as they grow. The mouth is small, with an end position. The upper and lower jaw have a row of teeth respectively. The teeth are slightly flat and sharp, with saw teeth on both sides. Dorsal fin and gluteal fin hard spines are sharp, with IV-V spines and II spines respectively, and each fin ray is not prolonged; The caudal fin is cut flat, and the upper and lower leaf margins extend like silk. The body is olive to dark brown, the gill membrane is white, and there are no markings on the side of the body; There are white edges around the soft strips of dorsal and gluteal fins and caudal fins.