The newest member of the Goldfish family is the Pearlscale, a very round and plump Goldfish with protruding scales. If these scales are loose, they come back looking like regular goldfish scales. This Goldfish can handle lower P.H numbers of 6.5. Pearlscales can have a headgrowth resembling that of Orandas or a bubble dome. However, some will not have those.
Peralscale with out headgrowth or crown
Pearlscale with crown
Because of their body Pearlscales can get stuck in places. In addition, they're often mistaken for having dropsy. They're in the top 3 hardest goldfish to take care of, along with the bubble eye and the lionhead because of their needs