The winter before last, I came home after thanksgiving trip to find a tankful of dead cichlids, victim of a broken heater...all my catfish(syn. Multipuntatus) died as well, except for a syn ocellifer. When I was cleaning up the tank, an absolute dreadful task, he plopped out of his usual hiding place, inside a hollow stump, and didn't seem to suffer at all with water temp in the mid fifties.
He is still with me today, easily the oldest of my fish. He was already full grown when I got him, and that was 10 years ago.