1. The growth rate of blackfish is relatively fast, generally speaking, the breeding of about two years can reach three pounds.

2. In the first year, the growth rate of blackfish is relatively slower, breeding a year its weight may only be about one pound.

3. In the second year, they grow faster and can grow to three or even five pounds.

4. Specifically, how long does it take for blackfish to reach three pounds will also be affected by the surrounding water environment and food.

5. To make them reach three pounds faster, you need to ensure that the breeding environment is suitable.