I've had them, they do seem to be temperature sensitive, I was lucky enough to get some that were not only from a naturally smaller population (about 3" as adults) it was also a warmer than usual drainage. they lived for several months in the low 70's but an eel i had forgotten was in the tank ate them. I hate eels, lol. I fed the sculpins daphnia magna and black worms. They did quite well but slowly disappeared over time due to the large eel that was hiding in the gravel, he started out as a tiny 2" larval eel. i thought he had died but he appeared when I took the tank down to investigate the disappearance of all the fish i had been putting in the tank. I thought maybe they were dying from contamination of some kind and rotting under racks or something but the now 18" inch eel was eating them!
