Gold Fish

Goldfish kept people happy to watch the fish. It is strange appearance, brilliant color, it can be said is a natural living works of art, which is loved by people. According to historical records and modern scientific experiment data, scientists have identified goldfish food originated in the wild common carp in China. It start with silver carp into the wild red and yellow gold carp, and then through the different periods of domestic, from red to yellow gold carp gradually turned into different varieties of goldfish. As ornamental fish, much time in China, Jin Dynasty (265 ~ 420) of red crucian carp record has been appears. In the Tang Dynasty, "Free Life", the carp began to appear red and yellow, golden carp Song began, people began to use goldfish pond, goldfish, and spotted two white color appears. To the Ming Dynasty moved the fish bowl goldfish. In animal taxonomy doors are vertebrates, with the first sub-gates, jaw, Pisces, really mouth subclass, Cypriniformes, Cyprinidae, subfamily carp, crucian carp is a bony fish. Goldfish and carp belong to the same species, in science with the same scientific name (Carassius auratus auratus).
The relationship between fish and humans are very close, back in the Stone Age, people catch fish as food. In the back 3200 years ago, China has a record of fish (based on oracle bone inscriptions unearthed), the long-term fishing, fish farming, with the opportunity to contact a lot of fish, which is an opportunity for observation of fish very much understand and more, so it is easy to find mutation in wild fish species, particularly into the types of gold or red more cause for concern. It was the golden or red fish referred to as "goldfish." Materia Medica of the Ming Dynasty the great scientist Li Shi Zhen, in his "Compendium of Materia Medica" in the written: the "golden point several carp carp Loach, loach, especially rare, single gold carp durable, rarely known before the ancient.

Above, the known as the "goldfish" fish the original four, the "golden carp" that color to yellow, red crucian carp, golden carp after training as a separate, more and more changes, so the "goldfish" the name represent the golden carp species cultivated all variability, that is today's goldfish.
Goldfish - external Reliability characteristics

Goldfish
The external morphology of goldfish, and crucian carp are vastly different, almost not a single character does not mutate. The body variations include body color, shape, number of scales, scale shape, dorsal fin, pectoral, pelvic, anal, caudal fin, head shape, eyes, gill cover, nasal septum and other variations. Cite here the main body color variation, the variation of head and eye shape variation.

Body color variation. The various colors of goldfish, mainly due to the dermal layer of skin pigment cells in many pigment cells generated date. Goldfish color components only 3 species: the black pigment cells, pigment cells and light orange blue reflective organization. All of these components are present in carp in the wild. Domestic goldfish body color bright and varied, but is that the realignment of 3 components distribution, strength, density changes, or disappears one, two or three components formed.
Head-shaped variation. Breeders all over the country is divided into head-shaped tiger, lion, goose head, high head, hat and toad head. In the first form in some the same type, have different names in various places. Such as Beijing called the tiger breeders, and in the South known as the lion; in Beijing called the hat, in the south known as the high-head or goose. According to Professor Chen Zhen here named, divided into flat-shaped head, goose, and 3 types of lion.
1, flat head type: its head is thin and smooth the skin, known as flat head type. A narrow flat head and wide flat head of the points.
2, the goose-type: head bump on sarcoma thick, and both sides of the gill cover is thin and smooth.
3, the lion type: head and gill covers both sides of the sarcoma is a thick raised, even when well-developed eye can cover.

Variation of the eye. Can be divided into normal eyes, longan, overturned eyes and blister.
1, normal eyes: the eyes of the wild-type carp were the same size as the normal eye.
2, longan: too much eye swollen and partially protruding eyes, this kind of eye is called longan.
3, overturned eyes: eyes heavenward and longan similar than normal eyes large, prominent eyes are partially outside of the eyes, the difference is that overturned the pupil of the eye upward at 90 degrees and toward the day. There is also a lateral eye in overturned in size with a translucent bubble, which overturned the eye known as the blister.
4, the Bubble Eye: The eye as large as the orbital and longan, but the eye is as small as with the normal eye, the eye of the lateral size of a translucent bubble, such as blister eye. There is also a similarity with the bubble eye, but eyes and translucent small blisters, in the eyes of the abdomen only form a small protuberance on the surface of the head shaped like a frog, so called frog head, frog head was also known as .
Biological species are not static. Its shape from a simple type can be evolved into a variety of forms..