Very deepwater ones like Boylei, Narcosis, and the even more elusive Abei (unlike the other two, this one’s never been found living above 100m) will probably need temperatures that are significantly lower than average reef systems. I think there’s a lone Boylei specimen in the tank of a Japanese collector who set up a dedicated system for it with pretty cool temperatures, and he’s had it for over a decade by now.
Interruptus also calls for lower temperatures due to their habitat mostly being in southern Japan. Perhaps the ones from the Northwestern Hawaiian Islands do okay under normal reef temperatures? Maybe but don’t quote me.
Debelius, if we ever see them, require somewhat lower temperatures too as they tend to live beyond the depth of most collectors / recreational divers. Only lone specimens have been found in shallower waters, and Scott W. Michael believes that’s because the main population is found much deeper (250-300 feet and below). The average person will never be able to afford one or even see a living one so yeah.
I’m not sure about Multicolors, Multibars, Colin’s and Venusta. I don’t think they’re strictly deepwater / very deepwater angels, just found at moderate depths relative to the average diver. Perhaps the Nahackyi falls into this category too, and we don’t see it because it’s almost impossible to obtain.
A lot of Genicanthus angels apart from the Lamarck’s and the Spotbreast possibly do better in cooler temperatures too, as they’re more common below 150-200 feet. However plenty of people keep them at normal reef temperatures and they do just fine. I do remember reading about Copps moving his Semifasciatus pair to a cooler tank because they weren’t liking temps in the upper 70s.
Bandit Angels are mostly found at depth (though not like super deep) so might also appreciate cooler temperatures.
