The beautiful and adorable but rare Jikin is believed to have originated from Japan. Its most prominent trait is its tail that has a pronounced X shape. The Butterfly tail has a characteristically long, cigar-shaped or torpedo-shaped body that is white with red lips, fins and gill covers. It swims in a characteristically jerky manner and can grow up to 9 inches long. Other names for Jikin include Peacock tail Goldfish and Rokurin.