goldfish


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goldfish,

freshwater fish, genus Carassius, of the family Cyprinidae, popular in aquariums and ponds. Native to China, it was first domesticated centuries ago from the wild form, an olive-colored carplike fish up to 16 in. (40 cm) long. It reverts to this type when it escapes from domestication and has been known to hybridize with the carpcarp,
hardy freshwater fish, Cyprinus carpio, the largest member of the minnow family; it is also known as the common carp. A native of Black, Caspian, and Aral sea basins of Eurasia, the carp has been introduced widely elsewhere in the world and has become so well
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. Breeders have developed bizarre varieties with fan, fringe, or veil tails and sometimes with double or triple fins. Some have bulging "telescope" eyes. The majority of those bred commercially are known as scaled goldfish and have a metallic sheen of red, gold, white, silver, or black. The rarer forms, which are called scaleless, actually have transparent scales and appear in bright red, blue, shades of purple, and calico patterns. Marketed goldfish range in length from 1 to 4 in. (2.5–10 cm). In pools, they are beneficial as well as ornamental, since they feed on mosquito larvae; however, their carplike feeding habits make them a nuisance in lakes and streams. Goldfish are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Cypriniformes, family Cyprinidae.

Goldfish

 

the domesticated form of the silver carass (Carassius auratus) and common aquarium fish. The first mention of goldfish breeding in China dates from the tenth to the 12th centuries; in 1611 it was brought to Portugal and later to England. In Japan the goldfish was first bred in the 16th century, and it appeared in Russia at the end of the 17th century. Selection by mutation and hybridization have produced a large number of breeds with attractive coloration, long fins, and protruding eyes, including the comet, shubunkin, veiltail, telescope, stargazer, lionhead, oranda, and pearl. When kept under proper conditions, goldfish reach sexual maturity in their second year; during spawning the female lays up to 2,000–3,000 eggs. The fish can live from 15 to 35 years in an aquarium. The goldfish feeds on moths, daphnids, shredded meat, earthworms, and various cereals and bread.

REFERENCES

Molchanov, A. V. Akvarium liubitelia, 4th ed. Moscow, 1948.
Il’in, M. N.Akvariumnoe rybovodstvo. Moscow, 1965.

A. A. SVETOVIDOVA

goldfish

[′gōl‚fish]
(vertebrate zoology)
Crassius auratus. An orange cypriniform fish of the family Cyprinidae that can grow to over 18 inches (46 centimeters); closely related to the carps.

goldfish

1. a freshwater cyprinid fish, Carassius auratus, of E Europe and Asia, esp China, widely introduced as a pond or aquarium fish. It resembles the carp and has a typically golden or orange-red coloration
2. any of certain similar ornamental fishes, esp the golden orfe (see orfe)
References in periodicals archive ?
We also spoke to Karen, who came home to find one of her goldfish dead and did what any sane person would do.
While your goldfish is very unlikely to reach 30 pounds, it does seem that there's some truth to the truism that goldfish can grow to fit their environment.
He said: "My children have kept goldfish in bowls for years and as long as they have enough space I don't think it is for me to intervene in legislation".
Even if you have only one goldfish, a large tank with a wide surface is really important so they get plenty of fresh air.
They also found a partially-eaten goldfish near the side of the pond.
In this case we were happy to find the goldfish were in good health.
How long a goldfish can survive without food varies, although according to experts, more than a couple of weeks is no small achievement.
Goldfish had been using linear multi-heads for its fresh shrimp packing activities, with speeds at or below 80 packs per minute.
There will be 20 varieties of goldfish and cold water fish on show and visitors can buy fish bred from champion show fish in the big fish auction, starting at 1pm.
The bank said that it would cut about 1,000 jobs at its Goldfish credit card unit.
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The Travelodge Hotel chain came up with the idea after a survey showed looking at goldfish for 15 minutes helps people get a good night's sleep.