1. Animal feed is one of the favorite nutritious feeds for goldfish. It has many varieties, the common ones are:
(1) Fish worms (commonly known as red worms, scientific name Daphnia) are zooplankton that breed in sewage pits, ponds and rivers, commonly known as various Daphnia.
(2) Cyclops, with a bluish gray body (commonly known as green jump), belong to copepods in crustaceans. Its advantages are strong vitality, fast swimming speed and being able to live for several days. But the disadvantage is small size. If it is used to feed parents of several years old, it is more difficult to hunt because of its fast swimming, and the cyclops can also bite its young. Therefore, it is best to scald it with boiling water when feeding cyclops.
(3) paramecium (commonly known as backwater) is a general term for several protozoa in plankton. Such as paramecium, can be cultivated with straw, which is most suitable for feeding newly hatched fry.
(4) Dragonflies, the larvae of mosquitoes (called blood worms in the south and oil fleas in the north), are chironomid larvae, and their body color is red, so they are named blood worms. They are nutritious, expensive, difficult to preserve and need to be refrigerated. Therefore, ordinary lovers can feed directly after freezing.
(5) water earthworm. There are many kinds of them, among which the most popular is the water earthworm goldfish. They are rich in protein, fat and vitamins. They generally live on the surface of sewage sludge in fertile rivers or flowing water, with one end piercing the sludge and the other end swinging with the water. Their bodies are small, soft, bright red or crimson and are easily swallowed by goldfish. However, they must be rinsed repeatedly before feeding. If possible, it must be kept for a few days, and then the earthworm spits out the mud and feeds it.
2. Plant feed
Of course, animal feed is the most ideal feed for goldfish, but in the absence of animal feed for various reasons, plant feed can be used as an emergency or life-sustaining auxiliary feed.
Weeds and aquatic plants are common, among which weeds are one of the smallest species of seed plants. Plants are as small as sand and have no roots, so they are more nutritious. The other is duckweed, which has filamentous roots. Goldfish should eat when they are hungry. Generally, only larger goldfish can be fed, not more. Before feeding, carefully check whether there are pests and eggs, or soak in low-concentration potassium permanganate solution for a while before feeding, otherwise it is easy to bring in germs and pests.
3. Synthetic feed
And the pellet feed needs complete nutrients to meet the needs of goldfish growth and development. The main ingredients should include protein, sugar, fat, inorganic salts and vitamins.
Taxonomically, goldfish and crucian carp belong to the same species (crucian carp). Goldfish originated in China, also known as "golden crucian carp", which is similar to carp, but has no mouth whiskers. It is an ornamental fish evolved from crucian carp.
There are many varieties of goldfish, and the colors are red, orange, purple, blue, ink, silvery white and five flowers. , divided into four strains: literary species, grass species, dragon species and egg species. 12 century, the genetic research of goldfish domestication began. 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.
In the history of human civilization, China goldfish has lived with human beings for more than ten centuries, and it is the earliest species in the history of ornamental fish in the world. Goldfish are easy to raise. It has a strange posture, colorful, generally golden yellow and beautiful appearance. Goldfish can beautify the environment and are very popular with people. It is an ornamental fish with China characteristics. Goldfish in China are mainly developed from crucian carp. However, color carp has attracted great attention since it was introduced to Japan. Thanks to the efforts of generations of goldfish breeders, China goldfish still tells the world the beautiful legend between movement and stillness. There is also a folk saying about goldfish in our country: buying two goldfish at home during the New Year means a long life in the coming year.
Baidu Encyclopedia Goldfish