Pearlscale (珍珠鱗 chinshurin in Japanese) is one of artificially bread ornamental fish species (Carassius auratus auratus) that differs from its relatives by the unusual shape of its scales that look like pearls.
Oranda (in Japanese – 和蘭獅子頭) is one of the artificially bred ornamental species of ‘goldfish’ for home aquariums (Carassius gibelio forma auratus), which is one of veiltail kinds, but it differs from them since it has fleshy outgrowths on its head and gill covers.
The main distinctive feature is its “hood” on the head, which is called ‘wen’. Wen starts to appear in about 3-4 month after the birth, but it gets fully formed only 1-2 years later. However, you can say that the ‘hood’ is completely developed only when it is 2-2.5 years old.