黑裙鱼 hēi qún yú Gymnocorymbus ternetzi

黑裙鱼（学名：Gymnocorymbus ternetzi）属脂鲤科，原产南美洲亚马逊河流域、巴西、乌拉圭、玻利维亚及阿根廷等地。黑裙鱼在自然界中长约6-8厘米，水族箱养殖的一般长约3-6厘米，体高，侧扁，近似菱形。臀鳍宽大，脂鳍较小，胸鳍、腹鳍、尾鳍均为白色。

百度翻译

The black skirt fish (scientific name: Gymnocorymbus ternetzi) belongs to the family Lipocyprinidae, and is native to the Amazon River basin of South America, Brazil, Uruguay, Bolivia and Argentina. The black skirt fish is about 6-8cm long in nature, and the fish raised in aquarium is generally 3-6cm long, tall, flat and nearly rhombic. Hip fins are broad, fat fins are small, and pectoral, pelvic and caudal fins are white.