The sharp-billed crocodile was first introduced into China as an ornamental fish. The dark black dorsal color is for males. The gray dorsal color is the female's. The female is slightly larger than the male. Females are slightly larger than males.
The finch eel is a fierce predator that attacks all fish it meets. When feeding, it will remain motionless and play dead until its prey comes close to it before launching a fatal blow, then circling around the bitten fish once or twice before eating it. Fishermen regard it as ominous because few other fish exist where it lives. It uses a unique air sac as a respirator to suck oxygen from the air.
The finch eel, which lived 150 million years ago, flourished in the Jurassic and early Cretaceous periods. Originally a freshwater fish, the sharp-billed crocodile is generally kept at a water temperature of 18-26 degrees Celsius, with little requirement for water quality, but it is difficult to reproduce in aquariums, and mainly lives in tropical rivers, lakes in the southern United States, Central America, Mexico, and the West Indies.
The most common type of finch eel. The body shape is strange and quite a living fossil. The body is long and cylindrical. The mouth protrudes forward longer, flattened like a duck's beak, the upper and lower jaw plates are hard, with hard teeth in the middle, and like a crocodile's mouth. The center of the back of the body from the eyes to the tail is covered with longitudinal rows of dark spots. The skin is covered with hard scales, which are firm and thick. The dorsal fin moves back to the caudal peduncle and is symmetrical with the anal fin. The caudal fin has black stripes. Body length 40-50cm, the longest reported to be up to 6 meters, elongated and cylindrical. The mouth protrudes forward, with bony plates on the upper and lower jaws and teeth, resembling the mouth of a crocodile. The body is greenish gray with a dark black pattern on the body surface. The skin is covered with hard scales, the skin is firm and scaly, and the skin is rough.
Baits include small live fish, fish meat, and water worms, which are easy to feed.
The finch eel is a fierce predator fish with a long mouth and sharp teeth. This fish will attack all the fish it meets. When feeding, it will pretend to be dead without moving until its prey comes near it before launching a fatal blow, and then circling around the bitten fish once or twice before eating it. The local fishermen regard it as an ominous thing, because there are few other fish in the place where it lives. Local fishermen are generally reluctant to eat this fish, and it is also not very fit for consumption. The sparrow eel is covered with a layer of diamond-shaped fish scales, which looks unusually tough like the armor worn by a samurai, but it is actually composed of inorganic salts. Many extinct ancient fish also have these scales. Like other ancient fish, the sparrow eel had a swim bladder attached to its esophagus, which it used to breathe. Sparrow eel eggs are extremely poisonous and inadvertent consumption by humans or other warm-blooded animals will result in death. It comes from North America. The long, powerful mouth makes it a ferocious, carnivorous fish in freshwater. It uses a human-like nose to suck oxygen out of the air. The fin eel is closely related to the bowfin, a fish that has survived from ancient times. Fossils from 120 million years ago have been found in Europe. The body is covered with diamond-shaped hard scales, which are very hard, and the mouth of most species is pointed like that of a crocodile. Due to its ferocious nature and strong survival ability, if it is allowed to reproduce in the local area, it will cause great harm to the local fisheries. Its presence in natural waters is a very dangerous thing, with a predominantly carnivorous diet, and is very likely to cause devastating harm to local fish. In Guangdong, two finch eels were mixed into the fish pond of a farmer, and in a month's time, the whole fish pond was eaten up, and its harm should not be underestimated. In addition, due to the eel's eggs are highly toxic, once someone accidentally eat, may be fatal.