Koi and grass goldfish? 1. The difference between varieties: Koi and grass goldfish are different, because Koi is crucian carp, and its origin is Japan. Grass goldfish belongs to carp, which is common in China, and there is a big difference between them in terms of species.
2. Color difference: There are many colors and varieties of koi, while most of the grass goldfish are red or golden, and there are very few white grass goldfish. They are also very different in color.
3. Morphological difference: The external shape of Koi and grass goldfish is also different. First of all, the mouth of Koi is downward and has a beard. Grass goldfish have their mouths down and no whiskers. Followed by the tail, Koi's tail is relatively small, and are single-tailed, grass goldfish's tail is relatively large, mostly two-tailed. Finally, the size of Koi is relatively large, and its adult body length can reach 1-1.5 meters. Grass goldfish are small in size, about 30-40 centimeters after adulthood.
Koi and grass gold are not recommended to be raised together, because first of all, they are too different in size, and Koi's ability to grab food is relatively strong, if mixed together, grass gold is likely to be unable to grab food. Secondly, the tail of the grass goldfish is relatively large, but the mouth of the koi is also relatively cheap, if mixed together, the koi is likely to bite the tail of the grass goldfish. Finally, there is the problem of oxygen. Grass goldfish does not need much oxygen, but Koi needs more oxygen. Their living habits are different.
