The head lump of the modern ranchu was refined by Kameyoshi Ishikawa I (Tokyo). The ranchu goldfish evolved from crossbreeding experiments with Chinese lionhead goldfish in Japan between 18. Other Common Names: Dutch worm, Maruko, buffalo-head goldfish.Additionally, given their waste production, robust water filtration is crucial.

They require dedicated care and attention specific to each variant. However, it’s worth noting that two exceptions, wakin and jikin, may grow larger than typical double-tailed goldfish and may require more spacious accommodations like a pond. These fish come in a mesmerizing palette of colors, ranging from vibrant reds and oranges to striking blacks, blues, and even calico patterns. They have double tails and various ornate features like wens (bubble-like growths), elongated fins, and unique body shapes. The main difference between the two kinds lies in appearance and swimming behavior.įancy goldfish are renowned for their rounder shape and captivating features, making them the most cherished and costly fish in the hobby. They are mainly categorized into two broad types – fancy goldfish (or double-tailed goldfish) and common (or single-tailed) goldfish.

Through careful breeding, people have developed more than 200 different goldfish varieties. Goldfish were among the earliest fish bred in captivity over 1,000 years ago.

2 goldfish tank size