No, the world's dirtiest fish is generally referred to as "catfish".

The catfish is an omnivore, and its main diet consists of aquatic insects and organic debris, but it also eats small fish, rodents and other living things, and even eats the carcasses of its own kind when it can't get enough.

The difference between the river group and catfish

1, the river group of fish mouth lower, crescent-shaped, that is, the river group of fish mouth like a shark's mouth, in the bottom rather than the front; catfish mouth in the front, short and wide round kiss, two pairs of nostrils, large slit, slightly protruding lower jaw.

2, the river group of fish lips fat, small eyes, four pairs of whiskers, small, no two long whiskers, only four small short whiskers, while the catfish has two long whiskers.

3, the river group of fish body long, conical kiss, forward significantly protruding. The head of the catfish will be significantly larger than the head of the river groupers, and the catfish head is flattened, and generally the head is larger than the body.

4, the river group of fish dorsal fins have 2, one in front, one in the tail. Catfish have only 1 dorsal fin on their back and it is small.

5. The dorsal and pectoral fins of the river groupers have serrations on the back edge of the hard spines, while the catfish does not.

6. The adipose fins of the river groupers are plump, while the catfish does not have adipose fins.

7. The tail of the river groupers is not round and fan-shaped, while the tail of the catfish is round and fan-shaped.

The name of the fish is "long-nosed shad", which belongs to the family of catfish, family Luridae, genus Shad.

Jiangtuan is not a kind of groupers, it is China's unique and valuable freshwater economic fish, mainly distributed in some sections of the Yangtze River and the lower reaches of major tributaries.

River group of aliases, different regions, different legends give it a different name:

Because it is migratory fish, also known as "catfish"; because of its high fat content, fat is particularly fat, eat unusually fat, also known as "fat fish "; Shanghai people think its appearance looks like a large rat, and thus the image of its "catfish rat"; according to legend, the Western Han Dynasty King Liu An preferred to eat the fish, and often this fish guests, so it is also known as the "King of Huai fish"! ......

Jiangtuan has always been famous for its freshness and fatness, and countless literati have written poems and articles in praise of it after tasting it.

Su Shi once in the "play catfish a great" in the words of "pink stone head is still boneless, snow-white dolphin is not medicine people", meaning that the meat of the river group of tender, fatty skin, both dolphin, crucian carp freshness, without the toxins of the dolphin and crucian carp thorns ...

"Fish Figure Zanjian" also contains: "migratory fish, puffer fish medicine people, when the fish more bones, both the two beautiful and no two poison, pink and snow white migratory beauty can be recorded, Xishi milk overflow, the water goat scapula cooked," where migratory fish is also said to be the river group.

To this day, the freshness of the river group or let many people rush, more people called the fourth fresh in the Yangtze River, the Yangtze River is one of the four big fish, one of the four big fish in the Qingjiang River.