I have been in Tonle Sap once and I saw people living on it with some fish cages as well. I think they are raising freshwater fish. In my area fish farms are on brackish water so different kinds of fish are available. It is good to hear that you have a sustainable source of fish. We are doing the same trying to maintain our source of aquatic products. I love Siem Riep and I want to be back one day.