The floor-working LFS attendants have no need to know exact IDs of all the species in the store.was kind of pissed that the lfs sales person didn't know what it was but it ate like a pig and grew very fast
Some Clarias have the same nebulous black pattern as a wels, to include batrachus, and are much more likely to have shown up at a lfs as a contaminant. Think that may have been what we're dealing with?Wels are nearly impossible to buy by accident. Actually, I should say just impossible. In the US anyway. It could have been an Ompok (siluroides is by far the most common) but since you say it outgrew 125 gal quickly, it could have been a Wallago, most likely leerii or micropogon. Which are usually expensive fish. Ompok are cheap.