Goldfish

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Goldfish

Colorful, inexpensive, and easy to care for, common goldfish are often children's introduction to owning a pet.

Content List

1. Scientific & Common Names

2. Characteristics

a. Breeding

b. Behavior

3. History

4. Present Status

5. References


Scientific & Common Names

Kingdom - Animalia

Phylum - Chordata

Class - Aptinopterygii

Order - Cypriniformes

Family - Cyprinidae

Genus - Carassius

Species - C. auratus

Common Names - Goldfish. Many varieties of domestic goldfish exist and are called various names. The wild version of this fish is often referred to as Asian Carp.


Characteristics

Goldfish can grow up to two feet long. They have long, stocky bodies and can come in a variety of colors including gold, silver, white, spotted, black, and brown. Wild goldfish do not always have the bright colors of those seen in pet stores. Fancier versions of goldfish may have bulbous eyes, longer tails and fins, and bulbous bodies.


Breeding

Goldfish usually lay eggs in spring after a cold winter. They reach sexual maturity around the age of three years. The female goldfish lays eggs and the male sprays milt all over them. Goldfish will eat anything at all, including their own eggs, so breeders typically remove the eggs from the tank. After about seven days, the goldfish fry will come out of the eggs and stick to the fish tank walls, bottom, and plants. Three days later, the fry are able to swim around and eat tiny bits of food.


Behavior

Goldfish prefer cooler water temperatures, and they can live outside even when the surface of the water is covered in ice. Goldfish adapt well to most pH levels and water hardness as long as they have a gradual adjustment. Goldfish eat quite a bit for their size and prefer vegetable matter for grazing. Goldfish need two or three times as much aquarium space as other tropical fish, usually about five gallons of water per inch of fish. They are popular choices for outdoor ponds, since they can tolerate very cold weather and contribute to the beauty of the water feature.


History

The common goldfish is native to China and other areas of the Far East, like Japan and Korea. The earliest recorded instance of raising goldfish in captivity was in 970 AD. The goldfish has been introduced to areas all around the world by fish enthusiasts. Goldfish were first brought to the United States in the early part of the seventeenth century, and they were intentionally released into the wild by settlers who wished to make goldfish a part of the native wildlife.


Present Status

Goldfish have a high tolerance for pollution and a great adaptability to various habitats. In certain states, they are regulated as invasive species. They are found all across the globe, and they are not considered endangered or threatened.


References

   http://www.fishchannel.com/fish-species/freshwater-profiles/goldfish-2.aspx
   http://animal-world.com/encyclo/fresh/goldfish/CommonGoldfish.php
   http://nas.er.usgs.gov/queries/factsheet.aspx?speciesid=508
   http://www.kokosgoldfish.com/breeding.html