1, Tang people have more beards, with 8 beards divided into 4 pairs, while catfish only have 4 small beards divided into 2 pairs. In addition, the dorsal fin of pond fish is very long, which can extend from the neck to the tail, while the dorsal fin of catfish is very small, only a little on the back.
2. Tang people are mainly distributed in southern China, including local Tang people and Egyptian Tang people. The fish in the local pond are yellow in color, mostly wild and small in size. However, the body color of Egyptian pond fish is black, and most of them are cultured artificially, and the individuals are large. Catfish mainly live in the middle and lower layers of rivers, lakes, reservoirs and ponds, and like to move in coastal areas. Most of them hide in grass, rocks or deep water during the day and frequently feed at night.