Rice-Fish farming is practiced in Asia - in countries such as the Philippines, Indonesia & Bangladesh -- and it provides a valuable source of protein. Fish fingerlings are introduced to the paddy at the beginning of the season and grow large enough for useful harvest when it's time to drain the field. A number of different species are used, among the tilapia, carp and catfish. apparently 5000 tilapia fingerlings per hectare ( = 2.47 acres) can yield 100 to 200 kg of fish in a 70 - 100 day growing season. That translates to 89 to 178 lbs per acre.
