The freshwater eel often feeds at night on small fish, crabs, shrimp, crustaceans and aquatic insects, as well as on the carcasses of decaying animals, and some individuals have been found to have scraps of higher plants in their food. Feeding intensity and growth rate with the increase in water temperature and enhancement, generally in the spring and summer seasons for the highest.

The freshwater eel in pools has a lower feeding intensity in the height of summer. When the water temperature is lower than 15℃ or higher than 30℃, the appetite decreases and growth slows down; feeding stops below 10℃. In winter, they dive into the mud and hibernate. Freshwater eels can breathe through the skin, sometimes leaving the water, as long as the skin remains moist, it will not die.

If you need to breed freshwater eels, the earthen pond for eel farming requires ventilation and sunshine, sufficient water, the area should not be too large, in the earthen pond around the planting of 0.8 meters to 1 meter wide water floats or aquatic peanuts, etc., and with a fence or mesh fence, which prevents eels from escaping, and also shade, conducive to its growth.

Before stocking the land should be dug out too much silt, level the bottom of the pool, repair the ridge and inlet and outlet, in the eel species in the pool before 10 days ~ 15 days per 1000 square meters with lime 100 kg ~ 125 kg of disinfection of the pool, thoroughly kill the wild fish and hostile organisms.

Then in the eel species under the pool 5 days to 7 days before the water injection 0.6 meters to 0.7 meters deep, the water inlet with 60 mesh sieve filtration. Lastly, the base fertilizer, generally per 1000 square meters splash 300 kg to 400 kg of rotting pig and cow dung, to be the water is light green or yellowish brown before the eel seed, so that it can eat enough natural bait. 15 days or so will deepen the pool water to 1.5 meters.

Expanded Information:

p>Freshwater eels will often face a career in the harshest of waters from birth. After being born in the brackish waters of the Sargasso Sea, near the West Indies in the North Atlantic, they travel to some of the freshwater rivers of the United Kingdom and the east coast of North America.

During this migration, their kidneys adapt to the varying salinity of the water. And when it's time to lay their eggs, they return to the sea, where their kidneys change again to adapt to the high salinity of the water.

Baidu Encyclopedia - Freshwater Eel