? Goldfish and shrimp are not recommended to be mixed, because if they are larger than goldfish, they will cause goldfish injury and wound infection. If the shrimp is smaller than the goldfish, the goldfish will probably eat them. Shrimps do not need sunlight or other light, while goldfish use sunlight or other light to synthesize pigments, so they are not suitable for living together.
? Goldfish and koi should not be mixed together, because first of all, the viewing methods of the two are different. The most beautiful place of koi is the back of the fish, which is more suitable for overlooking viewing, while the beautiful place of goldfish is the body of the fish, which is suitable for viewing at the same level. Therefore, raising the two together will reduce the ornamental value. Secondly, in terms of feeding, although both are omnivorous animals, the feeding speed of goldfish is far behind that of koi, so it is very likely that goldfish will not be able to compete with koi. Moreover, koi will bite the head of goldfish, even the stronger species, such as lion head, crane top red, and so on, can not escape the fate of being bitten. Finally, the two are different in size, and goldfish eat more, it is easy to affect the water quality, so it is best not to mix together.
