They never go limp, its in the hard armor they are covered with ( like some insects ), except there belly. Witch is a why I ask the season. They like to hang on the glass at night and thats when the room temp is lower, making the glass cold. So how to warm up...? Well that hot bar dangling in the back is enviteing... ... OUCH! Hot! And sense there belly is unarmored they don`t like it exposed, ( Ummm, plecostumus
)and the burn gets infected,
. Good thing I`m a night person or I would never have seen him on the glass ( because there nocturnal And with the not showing there bellies ). He would have been a goner, witch would have been a shame, hes a real nice specimen.