According to Baidu Encyclopedia, catfish, also known as catfish, is distributed in eastern Asia from the Heilongjiang River to the Pearl River system in China, and also in Russia, Japan and the Korean Peninsula. Carnivorous, to small individual benthic fish for food, but also inshore life of small fish for food. The pond jack, also known as pondweed, is widely distributed throughout southern China, mainly in the Yangtze River and water bodies south of the Yangtze River, inhabiting the lower reaches of rivers and streams, fields, pits and ponds, ditches and other places. Pondweed mainly ingests animal bait, such as insects, small mixed fish, shrimp, shellfish, etc. In artificial feeding, it can also ingest plant feed. It can be seen that the difference between the two is the distribution area and food is different.