When Basa first showed up here there was a fear campaign run showing video of the fish being harvested from effluent contaminated waterways. It has since been countered by claims that "apparently" this is a practice of farming them for "local" consumption, but "apparently", the export fish are taken from clean water.
We "supposedly" have very good food standards here and yet it is known that only a very small percentage of imported seafood is actually tested. I choose not to eat it.