Koi fish's body shape is similar to carp's. According to different species, the scales of the body will be different, and most of them will be more vivid. Fake koi fish is generally a crucian carp, with a figure like crucian carp, and koi fish has a beard, while fake koi fish is a crucian carp without a beard. Looking at the tail, koi fish's tail is still short, while crucian carp's tail will be wider. Look at the price, the price of koi fish, the price of adult fish will be much higher than that of crucian carp, and the price will be slightly different because of different varieties.

Koi fish has a strong physique, bright colors, changeable patterns and beautiful swimming posture, which is of great ornamental and breeding value. Its body length can reach1-1.5m. koi fish is distinguished by different colors, patterns and scales. Among them, koi fish, a butterfly, was successfully bred in 1980s and is famous for its long and smooth fins. It is actually a hybrid of koi fish and Asian carp, not a real koi fish.

The colors of koi fish include one or more colors, including: white, yellow, orange, red, black and blue (light gray shadow caused by black under fish scales), and the colors are dull or shiny. Although the patterns vary endlessly, the best patterns are dots on the top of the head and stepped stones on the back. Fish scales may or may not exist; Big or small; Or wrinkle like a diamond.