Goldfish, also known as "golden crucian carp", is an ornamental fish evolved from crucian carp. There are many varieties of goldfish, including red, orange, purple, blue, ink, silvery white, five flowers and so on. , divided into three categories: language, dragon and egg.
Goldfish originated in China, and the genetic research of goldfish domestication began in12nd century. After a long period of cultivation and continuous optimization of varieties, goldfish from all over the world are now directly or indirectly introduced from China.
Goldfish is easy to raise, and beautiful goldfish can beautify the environment, which is very popular with people and is a unique ornamental fish in China. Price: 1~ 100 yuan each.
Ornamental carp cultured in pots and ponds are called crucian carp. Originated in East Asia, but has been transplanted to many other regions. Similar to carp, but without beard. In China, at least as early as the Song Dynasty (960? 6? 5 1279) has been domesticated. In the wild state, the body is green, brown or gray, but there are various variations, such as black, color, gold, white, silvery white, three-tailed, dzi bead-shaped, or no dorsal fin. Over the centuries, the selection and cultivation of this abnormal individual has produced more than 125 goldfish species. Including the common tulle wing with a three-leaf tail, the lion's head with a velvet hat, and his eyes protruding to the sky. Omnivorous, feeding on plants and small animals. Small crustaceans are also eaten during breeding, and chopped mosquito larvae, grains and other foods can be used as supplementary feed. Oviposition takes place in spring and summer. In this season, the body color begins to become bright, the female fish's abdomen expands, and the male fish's gill cover, back and pectoral fin can be idolized with the size of a needle tip. Eggs attach to aquatic plants and hatch for about a week. It is known that the life span of ornamental goldfish is 25 years, but the average life span is much shorter. In many parts of the eastern United States, goldfish that have escaped from parks and gardens have become wild. Restore your true colors after playing wild, and you can raise 5? 6? 5 10 cm (2? 6? 54 inches) to 30 centimeters.
Goldfish is an ornamental fish that our people are happy to raise. It has become a natural and living work of art because of its peculiar posture and gorgeous colors, so it is loved by people. According to historical records and modern scientific experiments, scientists have found out that goldfish originated from wild crucian carp, which is widely eaten in China. First, it changed from silver-gray wild crucian carp to red-yellow golden crucian carp, and then from red-yellow golden crucian carp to different varieties of goldfish after domestic rearing in different periods. As an ornamental fish, red crucian carp was recorded in China as early as the Jin Dynasty (265-420). Red and yellow crucian carp began to appear in the "release pond" in the Tang Dynasty, and golden crucian carp began to appear in the Song Dynasty. People began to raise goldfish in ponds, and the color of goldfish appeared in white flowers and spots. In the Ming Dynasty, goldfish moved into a fish tank. In animal taxonomy, it belongs to vertebrates, cephalopods, jaws, fishes, eustoma, CYPRINIDAE, CYPRINIDAE and Carassius. Goldfish and crucian carp belong to the same species and have the same scientific name (Carassius auratus) in science.
Fish is closely related to human beings. As early as the Stone Age, people lived on fishing. More than 3,200 years ago, there were records of fish farming in China (according to Oracle Bone Inscriptions unearthed in Yin Ruins). Because of the long-term fishing and fish culture, there are many opportunities to contact with fish, which means that there are many opportunities to observe and understand fish, so it is easy to find the mutated species in wild fish, especially those that turn golden yellow or red, which are more likely to attract people's attention. At that time, people collectively referred to golden or red fish as "goldfish". Li Shizhen, a great pharmacist in Ming Dynasty, wrote in Compendium of Materia Medica: "There are several kinds of golden spots, such as carp, crucian carp and loach, especially loach, but golden crucian carp is durable, which was unknown in ancient times.
As can be seen from the above, there are four kinds of fish called "goldfish". The "golden crucian carp" is the kind of crucian carp that turns yellow and red, and it has changed more and more since it was farmed alone. Therefore, the name "goldfish" only represents the variety cultivated by golden crucian carp, which is today's goldfish.
Goldfish's hometown is Jiaxing and Hangzhou, Zhejiang. Goldfish from all over the world came from China. According to the research of Japanese scholar Ishii Matsui (1934), the earliest record of China goldfish being introduced into Japan is 1502. Goldfish spread to Britain at the end of 17, and to European countries in the middle of 18, and 1874 to the United States.
The external morphology of goldfish is very different from that of crucian carp, and there is almost no character without variation. Its posture changes include body color, body shape, scale number, scale shape, dorsal fin, pectoral fin, ventral fin, anal fin, caudal fin, head shape, eyes, gill cover and nasal septum. Here are the changes of body color, head shape and eyes.