2, wild eels are listed in the World Conservation Union (IUCN) 2010 Red List of Threatened Species ver3.1, and belong to the non-threatened wild protected animals (LC).

3. Eels prefer to burrow in humusy silt during the day or in watery rock crevices on embankments. Very little activity during the day, the night out of the hole for food. Nocturnal, oral skin folds viable respiration, so can breathe air directly. Winter and dry season, will dig holes as deep as 1-2 meters underground, several fish **** habitat. Gills are not developed, but with the oral cavity and the laryngeal cavity of the inner wall of the epidermis as a respiratory auxiliary organs, can breathe air directly.

4, pond fish, fish, wild is not recommended for consumption, the scientific name of bearded catfish, also known as pond fish. In the classification of catfish, bearded catfish family. Belong to the tropical, subtropical fish, distributed throughout the south of China. Domestic common two varieties: local pond catfish (bearded catfish), Egyptian pond catfish (leather bearded catfish, Egyptian bearded catfish). Pond catfish (local bearded catfish), 8 whiskers, 4 on the top and 4 on the bottom. Body color yellow, slow-growing wild fish, generally weighing no more than 1 city pound, high nutritional value, good taste. It can be farmed artificially and has a large market potential. Most of the unmanned pond fish survive in sewers and other sewage environments, extremely strong vitality, fecal water can also be reproduced.