Is koi a kind of goldfish? How to distinguish?

Koi carp is not a kind of goldfish, koi carp in biology students are divided into Cyprinidae, Cyprinidae is also the largest family of all fish species, more than 1400 species, is a high-grade ornamental fish in the world today, known as the "living gem in the water", swimming works of art, goldfish is a kind of crucian carp, strange posture, gorgeous, deeply loved by the Chinese people. Many breeding enthusiasts must choose goldfish to raise fish.

1. Is koi a kind

of goldfish? Koi is not a kind of goldfish. Koi is a human variety of carp, belonging to Cyprinidae. Goldfish is an artificial variety of crucian carp. Koi is a large ornamental fish, while goldfish is a small and medium-sized ornamental fish.

2. How to distinguish between koi and goldfish

1. Body size: Koi is bigger, slightly longer, and its body length can reach more than one meter, while carp is relatively smaller, short and thick, with few individuals exceeding 20 centimeters.

2. Tail: There is a big difference between the tails of two common ornamental fish, koi and goldfish. Koi has two tails, while goldfish has three or four tails. If a goldfish has two tails, it can be said to be a disabled goldfish.

3. Color: Koi is a colorful carp. The surface color of the fish is bright and the color is like brocade. The name of Koi comes from this. Koi is a variety of red carp. It has been a common phenomenon as an ornamental fish in the Ming Dynasty. Through continuous variation and artificial improvement, many new varieties have been bred. The color of goldfish is more diverse, red, orange, purple, blue and other colors.

4. Whiskers: Koi has whiskers around its mouth. There are about four whiskers, two long and two short. Koi does not have whiskers.

5. Mouth: The koi fish looks fierce with its mouth down and beard. The mouth of the goldfish is upward, and it looks gentle and pleasant.