I've spearheaded a lot of the work on these fish and I feel I may have inadvertantly mislead people.
I've always told people to give them strong current, but I've never advocated making it so strong as to disallow calm resting areas. Even in my ATF writings, the diagram that I use specifically points out and creates slack areas for rest. Goonchs are the same IMO.
The large, wild fish are prime examples of this. The actively hunting fish that we see caught are generally either in the strong current or in a pool where the strong current discharges. Resting fish are commonly found in structure, particularly rocks, be it in current or not.
As for Liam's fish, I agree that it is likely representative of the LLG, Bagarius yarrelli; as opposed to the HLG, Bagarius bagarius. The LLG grows large and fast as well. It makes sense that it would, at least at times, not favor the current. The areas in which those are found tend to undergo seasonal flooding and vary from shallow, rapid rivers to deep, slack rivers. This seasonal change is probably a bit better of an explanation than my migration idea. Lica and rutilus fall into this category as well.
I've always supported the idea that the six species likely have very different needs. We in the hobby have been trying to treat everything in this genus as though it was either straight out of the Himalayas or to treat it as if they were the typical South American tropicals.
These guys are unique, rare and extremely specialized predators which are, in the finest traditions of specialized predators, very delicate animals who require very specific conditions to survive, let alone thrive. We in the hobby only have a vague idea of what they need. After all, what real reason do we have to expect that a fish from the foothills of the Himalayas would require the same conditions as one from the jungle swamp waters in Borneo?
I've been actively working on the Guide to the Care and Identification of Goonch Catfish (Bagarius) for two years now. I don't think I'm really any closer to publishing it now than I was when I started. Every question answered generates two more and I don't want to put my name to a half assed work.
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