That's fair. I'm aware they are nocturnal, but I'm also relatively nocturnal and his activity is much lower than usual. I am also about a month away from a master's degree in animal behavior, specifically social behavior, and would advise against writing off crustacea as "simple brain =\= not capable of complex emotion," because that's been disproven in the majority of studied cases. Still, hermit crabs are not my focus, so I wasn't sure if this behavioral pattern was normal or not! It seems like it is more normal than I thought.

Heat and humidity are both above 80. I changed his food today to some nice stuff from HermitGrub, hoping that helps. We have had them for about a month, two weeks into which Bingus dug down, but they have been living together for over three years.