Crocodile eel is a tropical freshwater fish native to America, which is a fierce discomfort in the primitive environment. Once introduced into China as an ornamental fish, once it enters the wild waters, it will cause serious invasion of alien species, threaten native native fish and need large water bodies. It is difficult to continue to grow after breeding to a certain extent. So artificial feeding is not recommended.

Because alligator eels have no natural enemies in China and are at the top of the food chain! It is precisely because of the "non-rejection" of crocodile Monopterus albus that it is listed as an invasive species to be guarded against by various countries.

Morphological characteristics of Chinese alligator eel;

The crocodile eel is 1.2- 1.8m long and weighs 45-72kg. The female is slightly larger than the male, which is the largest of the seven kinds of eels in existence. The fish is long and cylindrical, with a prominent snout, short as a crocodile, and two rows of dagger-like teeth on the upper and lower jaws, hence the name.

The body is covered with hard diamond glaze scales, like wearing a helmet and armor. Brown or olive back, shallow abdomen. Scales are diamond-shaped hard scales, which American Indians sometimes regard as gems. The female fish is slightly larger than the male fish, which is the largest species of existing finches.

Crocodile eels are usually dark olive green in color, with faded grayish white on both sides of the back and white on the abdomen. The scales are big and hard, and the middle of the back is dotted with different shades of camouflage black, and there are also periods when pale gold and white spots are mixed. The dorsal fin, caudal fin and anal fin have black spots, mostly olive green or gray, while the anal fin and pectoral fin are generally gray or white. Fins, especially the abdomen, usually have red and pink tones, which may be related to vascular saturation.