It is goldfish that are perhaps the most recognizable marine inhabitants in the world. Hundreds of thousands, if not millions, of people keep them at home as pets, and breeders breed their new breeds. And really, why not? These creatures are really beautiful, and watching them is a very reassuring experience.
With different illumination, the brightness of their color changes. The lighter, the brighter they look. Goldfish with proper care can live for 30-35 years, or even more. There are many jokes about the short memory of goldfish. In fact, these creatures remember not only the last few seconds, and they have no reason to complain about memory. Many people think that goldfish have no teeth. In fact, they are, they simply cannot be seen, because they are not on the edge of the mouth, but in the throat. Many fish have poor eyesight, but only they. The eyes of goldfish surpass the eyes of a person in their ability to distinguish colors. Their sense of smell is also very acute. They can feel the food in the water at a very solid distance.
Goldfish living in nature, in rivers and lakes, in temperate climates, hibernate for the winter. Goldfish have no stomach at all. Its functions are performed by the long intestine. They do not know how to close their eyes. Actually, they even sleep with their eyes open. In Chinese culture, these creations are one of the symbols of good luck.
Goldfish lead a strictly daily lifestyle, so they sleep at night. Now there are about 300 of their varieties. Zoologists claim that purely biologically goldfish are related to common crucian carp. They cannot live in salt water – only in fresh, and preferably pure. They domesticated goldfish a long time ago, about 1200 years ago, and even more.
