Opium fish is a deep-sea fish, opium fish is actually a kind of wild deep-sea sea fish, the content of brain gold in its head is very high, which is 36 times more than that of ordinary fish head.

Guillow fish is freshwater fish, the price of guillow fish is usually around 40 yuan to 60 yuan per catty, due to the different geographical areas and the constant changes in production, resulting in the price of guillow fish will also change. The fry used to culture guppies in the northern region are mainly natural fry caught from reservoirs and artificially bred fry purchased from the south. And there are problems such as low survival rate of transportation and rearing, easy to bring in exogenous pests and diseases and high production cost when purchasing and transporting breeding fry from the south.

There is not much difference between the prices of these two types of fish, but the flesh of the opium fish is more tender and hygienic than that of the guppy.