The spinless bream is Wuchang fish. According to relevant data, Wuchang fish, whose scientific name is Megalobrama amblycephala, commonly known as bream and grass carp, is flat in shape, with obvious hump on the back and small head, and is mostly distributed in large and medium-sized lakes in the middle reaches of the Yangtze River. Wuchang fish breeds quickly, is easy to raise, has high meat content and is spineless.