There is a big difference between red-topped fish and red-topped koi carp. For example, red-topped fish and red-topped koi carp are two different fish. The red-topped fish, whose scientific name is "gold thread fish", is a freshwater fish native to the Yangtze River Basin and Taihu Lake Basin in Jiangsu, Zhejiang and other places in China. The red-topped fish is small in size, with a silvery white body, blue or green back and sides, and an obvious "red-top" red spot on its head, hence the name red-topped fish. fish.
The red-top koi, whose scientific name is "red, white and green koi", is a kind of ornamental fish that is loved by many enthusiasts because of its bright and beautiful body color. The red, white, and green patterns on the body of the red koi are very gorgeous. Compared with the red-crested fish, the red-crested koi is larger in size, usually more than 20 cm.
