体形端正,雄健,无外伤和出血等病状,色泽要浓厚、纯正,花斑如果形成具有一定艺术性图案者更佳。此外,要观察鱼身上有无白点、白色绒毛、血丝和溃烂等病状,再看胸、腹、尾鳍是否齐全,游动时是否欢畅活泼,有无翻滚、侧卧、倒立或沉底现象。不健康的鱼不能选。 Body shape, robust, no trauma and bleeding and other symptoms, color to thick, pure, piebald if the formation of a certain artistic pattern better. In addition, we should observe whether the fish have white spots, white fluff, bloodshot eyes and ulceration and other symptoms, look at the chest, abdomen, caudal fin is complete, swimming joyful lively, with no rolling, lateral, inverted or sinking phenomenon. Unhealthy fish can not choose.