Channel catfish (shad) lower body slightly pink, scale-free, long and thick, abdominal expansion, tail side flat. Channel catfish is one of the three treasures of the Yangtze River aquatic products, the scientific name of "long-nosed catfish (shad)", because of the "back" homophonic, folk commonly known as "back to the fish", also known as the "back to the fish", also known as the "shad", the "back to the fish", the "back to the fish", the "back to the fish", the "back to the fish". Shad fish", "fat sink", "river group", "white". English name: longnose catfish, this fish is only seen in the big rivers and streams in the rocks, lakes are extremely difficult to see, streams or weirs will not have, the survival of the waters are generally at least in the depth of more than 10 meters.

LiuTao catfish is generally 1500-2500 grams, a few individuals up to 10 kilograms. Spring and winter seasons, the Yangtze River estuary catfish body fat, tender meat, is the best time to taste.

Su Dongpo had written a poem praising it said: "pink stone head is still boneless, snow-white dolphin is not medicine people". Poetry out of the special features of catfish: white meat, fish skin fat, both puffer fish, crucian carp freshness, without the toxin of puffer fish and crucian carp thorns more.