[Peter Finke]

You are right, Christian, nobody confirms that. We detect no serious differences, the fish are sold with the same name, so we think they come from the same source. Yes, that must not be the case. Nevertheless, it is probable that even if most former habitats in the Sentang-area are destroyed in the meantime, some ditches or other waters are still existant. The fish of today may not come exactly from the same source, but they might come from nearby sources, that is: from the same place (if “place” is taken in a generous sense).
We shall see: I feel reminded at the “blue line – hype” some years ago. There were “blue lines” everywhere in Europe to be found in the fish-shops, and then, suddenly, it was (nearly) out. This time, it is likely to go the same way.