蝶尾金魚, also known as the Butterfly Tail Goldfish, is a popular ornamental fish characterized by its unique tail shape, which resembles butterfly wings. This breed is a variant of the Goldfish and is known for its graceful swimming and vibrant colors. These fish typically have a rounded body and long, flowing fins, making them visually appealing in aquariums. They thrive in well-maintained water conditions and can grow to about 6 to 8 inches in length. Proper care, including a balanced diet and regular tank maintenance, is essential for their health and longevity.