a small,brilliantly colored South American freshwater fish(Symphysodon discus) that has a disk-shaped body and is popular in home aquariums

• 产于南美的一种色彩艳丽的小型淡水鱼（七彩神仙鱼），身体呈圆盘状，而且是一种很受欢迎的家养观赏鱼