Short-headed head deformity is shorter than normal body, which is not suitable for reproduction, and is generally the product of inbreeding. Short head is shorter than normal fish (from eyes to mouth) and belongs to abnormal species. This kind of fish is difficult to raise and has different ornamental value.
Alien fish is the darling of ornamental fish. Heterotypic fish have different appearances, from small to large, and there are many varieties. Prices range from a few yuan to a thousand yuan according to the variety value. Heterotypic fish is full of a kind of wild and unruly temperament unique to wild fish, which has become the object that aquarium farmers like and buy. Alien fish species have corresponding L numbers, and each number represents a newly discovered alien fish.