Roughly all imported fish can be divided into two categories: wild (Hake, Hoki, kingklip, pollack, etc.) and farmed (salmon, sea trout (the one which Oncorhynchus mykiss), tilapia, catfish and Taiwan, etc.) . Pangasius refers to the second group and, probably, is the mass of artificially produced fish. In the original photo is just he is (like the kind of river pig - a pig snout is not a nickle).Pangasius (this is important, too) is a freshwater fish and is produced mainly in Vietnam. Without exception, all the production (all without exception, companies monsters) are in the Mekong Delta.
About twenty years ago in Vietnam Pangasius farm production has begun, though it is oriented to the domestic market (which is not surprising when more than eighty million people). Eleven years ago, began exporting Pangasius, which is very beneficial to the industry: over the years in Vietnam have are concentrated in the hands of the entire production cycle (from fingerling to the final product) and numbering up to twenty thousand workers in the season.Immediately apologize for the quality of photos shot exclusively for themselves and do not count on it that I ever have to publish them.
A. Mekong - to put it mildly is not the cleanest river. Swim there, I would not dare. Perhaps this is one of the reasons due to which the pangasius in the world is very cautious attitude.