Aquaculture or aquatic farming is a good idea to venture in business industry. Most of the fishes for aquaculture are Tilapia, Carp and Salmon.
Tilapia (image from dealbreaker.com)
Carp (image from cornell.edu)
Salmon (image from cornell.edu)
These above mentioned and indicated fishes for aquaculture are freshwater fishes which are purposely for human consumption. They are often reared in ponds or even in large tanks.