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The Pearlscale (or Chinshurin in
Japanese Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspor ...
) is a spherical-bodied fancy
goldfish The goldfish (''Carassius auratus'') is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have bec ...
with doubled finnage similar to the
fantail Fantails are small insectivorous songbirds of the genus ''Rhipidura'' in the family Rhipiduridae, native to Australasia, Southeast Asia and the Indian subcontinent. Most of the species are about long, specialist aerial feeders, and named as "f ...
."An Interpet Guide to Fancy Goldfish" by Dr. Chris Andrews, Interpet Publishing, 2002. -


Description

The characteristic feature of the Pearlscale is its thick, domed scales with pearl-like appearance."Fancy Goldfish: A Complete Guide to Care and Collecting" by Dr. Erik L. Johnson, D.V.M. and Richard E. Hess, Weatherhill, Shambala Publications, Inc., 2006. - Its body is round and similar to a golf ball. The finnage may be long or short. Pearlscales can reach up to 8 inches long and grow up as large as an
orange Orange most often refers to: *Orange (fruit), the fruit of the tree species '' Citrus'' × ''sinensis'' ** Orange blossom, its fragrant flower *Orange (colour), from the color of an orange, occurs between red and yellow in the visible spectrum * ...
. Pearlscale goldfish are susceptible to
swimbladder The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ that contributes to the ability of many bony fish (but not cartilaginous fish) to control their buoyancy, and thus to stay at their current water depth w ...
disorders which affect the ability to maintain normal position in the water. This is attributed to the selective breeding process of fancy goldfish to achieve particular body forms, such as that of the Pearlscale's roundness, which results in the alteration of the appearance of the shape and function of the swimbladder. The Pearlscale can also known as the ''Ping Pong Pearlscale'' and ''Golfball Pearlscale''.


Breed standard

The Pearlscale standard is as follows: * Depth of body to be greater than 2/3 of body length * Scales to be domed * Dorsal fin to be single, all other fins to be paired * Caudal fin to be divided and forked and held above the horizontal * Extremities of fins to have a slightly rounded appearance * Minimum length of body to be 5.5 cm (2¼ inches) The fish should be bright and alert and displaying well developed domed scales all over the body area. The body should be short and rounded (not elongated). The caudal fin should be held high without signs of drooping and well divided. Quality fish will have high color intensity extending into the fins.Article on ''Pearlscale Goldfish'' from bristol-aquarists.com
/ref> File:Pearlscale.jpg, Orange and white fancy Pearlscale goldfish File:Ping pong pearlscale.JPG, Pearlscale before wen and domed scales have developed File:Large Pearlscale Goldfish.jpg, Pearlscale goldfish in a hand


Coloration

Pearlscales come in every fancy goldfish color variety. The color may be metallic (ideally self-colored or variegated in a pleasing pattern and similar on each side), orange or calico. The Pearlscale may also be fully black in color. Metallic colors should appear as burnished metal, extending into the fins. Calico fish should have a blue background with patches of violet, red, orange, yellow and brown, spotted with black.


Variants

Pearlscales are found without headgrowth (''wen''), with
Oranda An oranda is a breed of goldfish characterized by a prominent bubble-like "hood" on the head. The headgrowth or hood (also known as ''wen'' or ''crown'') may be a prominent growth on the top of the head (cranial region) or may encase the entire ...
-like headgrowth, or with two large bubble domes. The bubble-domed Pearlscales are known as High-head Pearlscale, Crown Pearlscale or Hama Nishiki.


Special requirements

Like many fancy goldfish, Pearlscales are egg-shaped with internal organs crowded in a compacted body, therefore overfeeding should be avoided. Pearlscales are very sensitive to cold water and should not be exposed to temperatures below 55°F (13°C). They are also quite vulnerable to pH changes and should not be exposed for long periods to overly acidic or alkaline environments.


See also

*
Goldfish The goldfish (''Carassius auratus'') is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have ...
**
Oranda An oranda is a breed of goldfish characterized by a prominent bubble-like "hood" on the head. The headgrowth or hood (also known as ''wen'' or ''crown'') may be a prominent growth on the top of the head (cranial region) or may encase the entire ...
**
Fantail Fantails are small insectivorous songbirds of the genus ''Rhipidura'' in the family Rhipiduridae, native to Australasia, Southeast Asia and the Indian subcontinent. Most of the species are about long, specialist aerial feeders, and named as "f ...


References


External links


Varieties of Goldfish -About Pearlscale
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