Fugapuff, I can understand what it is your saying with the reasoning you are using.
In alot of cases, you are absolutely right. For example when people in these forums get flamed for providing a Jag with a 75 gallon tank or there are 4 fish over 10 inches in a 100 gallon, or whatever. Any of the examples alot of individuals get flamed for on this forum.
But, in no way do I think this tank with these three fish can be justified. You using the seasonal changes in the Amazon to justify this tank to me is unexceptable. Yes, animals do face many hardships in their natural enviroment. That is nature, it is harsh and many times unforgiving. But, in this particular example, I do not feel that the individual who owns these fish can honestly feel he/she/they are providing these fish with a quality living enviroment. The RTC cannot properly turn, the head on the RTC does look to be slightly deformed, is that a direct cause of space limitation, I don't know, could have been that way from birth, but to rule out the space would be an oversite.
As far as what you stated about a human being in a 600 square foot apt. If you think about it, 600 sq ft is still more living space then this and for that matter, would you be happy in that size space for all of your life. This space being a place you could not venture out of. To top it off, you are in that space for the rest of your life and your 6'8, 400 pounds and you have two others in there of that same size, forever, this is not temperary like a holding cell, even prisoners get to go to the yard. No matter if it was clean, you were well feed and there was alot of air flow, I doubt you would enjoy this much. Could you live there, yes, would you like it, well I can't speak for you, but I would not.
Ever wonder why aggression dies down in larger tanks, think it has to do with space? Hummm, I do. But i'm not an importer, so maybe it's me who has to reevaluate the situation.
For what it's worth, you make many valid points in your arguments, and I would be on your side in this battle most of the time, but in THIS particular situation, I think you are way off base.