Yes Sand-haired fish is a kind of tropical fish, which is big, prickly and tastes like a river eel, so it is called "eight-bearded catfish eel", which has the advantages of fast growth, wide feeding habits and few diseases. It is an excellent variety of freshwater fish, but its disadvantage is poor cold tolerance, and it is easy to freeze to death when the water temperature drops below 7℃, so the growth period is very short, only 5 ~ 6 months throughout the year, because it can't overwinter in natural waters.