I caught a handful of them on dry rocks about 30 feet from waterfall last month, but neglected to move them into a container with holes in it after I got home (they weren't my target species for the trip, but just an unexpected side note). They were dead a week later, possibly from too much humidity, lack of air, or a combination thereof.
I'd be very interested to learn more about culturing them, especially since I can find them in an area I go to a few times each year.
What's your particular interest with them? Feeder? Interesting!
(I love your culture list, Ralph!)