Between grass goldfish and koi, the most important difference is the morphological difference. We usually distinguish between grass goldfish and koi, the main factor is their morphology. Specifically, morphological differences can be divided into the following aspects:
1, whiskers: the first is the difference between the two whiskers. Koi fish generally have beards, while grass goldfish generally do not have beards. From this aspect, generally speaking, it can be distinguished quickly and accurately.
2. Body type: There are some differences between them. Koi fish are round and fat, while grass goldfish look flat. However, it is sometimes difficult to distinguish from this aspect.
3. Dorsal fin: The position of the dorsal fin is also different. If grass goldfish, then its dorsal fin is relatively forward, while the dorsal fin of Koi is relatively backward.
4. Mouth: The directions of the two mouths are also different. Koi's mouth is generally downward, while grass goldfish's mouth is forward.
5. Tail: The length of their tail is also different. Koi fish have a short tail, while grass goldfish have a long tail.
6. Sarcoma: Furthermore, it can be judged by the presence or absence of sarcoma. Generally speaking, if there is sarcoma, then it is grass goldfish, koi is not long sarcoma.
The color of grass goldfish and koi also have some differences. For example, golden, the whole body is golden grass goldfish is more common, while the color of Koi is mostly red and white, the whole body is golden, but also rare.
The length of grass goldfish and koi will also be different. Generally speaking, the length of Koi can reach a relatively long, some can reach half a meter or more. The length of grass goldfish is relatively short, in thirty or forty centimeters is relatively long.
