Catfish and catfish, also known as catfish, are the most widely distributed fish in the catfish family. The dorsal fin is very small, without spines, with 4 ~ 6 fins. Fat-free fin The anal fin is very long, and the rear end is connected with the caudal fin. Catfish are usually dark brown or gray-black, with slight dark cloud spots.
On adult fish, there are two pairs of beards, that is, four pairs. The maxilla must reach the end of pectoral fin, but the mandible must be very short. Catfish must have three pairs, that is, six pairs when they are larvae. When the body length is about 60 mm, 1 pairs of chin whiskers begin to disappear and become four.
Extended data
Four whiskers are the basic characteristics of catfish, but two kinds of catfish are special, with eight whiskers:
1, bearded catfish, 8 beards, 4 up and down. The body color is yellow, the growth of wild fish is slow, and the general weight is not more than 1 kg, which has high nutritional value and good taste.
2. The leather bearded catfish, also known as the Egyptian bearded catfish, was introduced from Egypt. Eight whiskers, black all over, huge individual. Most of them are farmed artificially, and the largest individual is above 10 kg. Easy to breed, fast growing, and many people are breeding in life.
References:
Baidu encyclopedia-catfish