Silver carp (Carassius auratus gibelio) is slightly pink and scaleless, with a thick and long lower body, swollen abdomen and flat tail. Catfish is one of the three treasures of aquatic products in the Yangtze River. Its scientific name is catfish. Because it is homophonic with Hui, people commonly call Hui fish, also known as Xi fish, flywheel, Jiang Tuan and Bai Ji. English name: longnose catfish. This kind of fish is only found in the rapids and rocks of big rivers, and it is extremely rare in lakes, but not in streams or ponds. Generally speaking, living waters are at least 10 meter deep. Catfish in Tamia Liu are generally 1500-2500g, and a few individuals can reach 10kg. In spring and summer, the mouth of the Yangtze River is plump and tender, which is the best season for tasting. Su Dongpo once praised it in a poem: "The powder stone is still boneless, and the white puffer fish does not cure the patient." The poem reveals the special features of catfish: the meat is white and tender, the flesh is plump, and it has the delicacy of puffer fish and crucian fish, but it is not poisonous to puffer fish, but prickly to crucian fish.