A red and white fantail goldfish has a rounded, egg-shaped body, a split fan-shaped tail, and can be metallic or pearlescent in its red and white patches. They are graceful, slow-swimming, social fish originating from China, that thrive in coldwater environments and require large tanks with filtration. Fantails are peaceful and should be kept in groups with other fancy goldfish varieties to prevent bullying and to ensure they have company.