Question

difference between polyculture fish farming and monoculture fish farming

Answer 1

monoculture:
This is the culture of single species of fish in a pond or tank. The culture of Clarias only or Oreochromis niloticus or Heterotis or Gymnarchus are typical examples of monoculture.

The advantage of this method of culture is that it enables the farmer to make the feed that will meet the requirement of a specific fish, especially in the intensive culture system. Fish of different ages can be stocked thereby enhancing selective harvesting.
whereas Polyculture is the practice of culturing more than one species of aquatic organism in the same pond.