Oh. What kind of roaches are they? Hybrids? I know when I had a halloween hisser nymph, he/she was also black. She died all of a sudden. I'm keeping 8 babies in one of the "baby tanks." A small enclosure about 6 inches tall, 6 inches long, and 3.5 inches wide. If I spray water into them, they instantly start to build mold. So I provide extra quencher jellies for them to go under to stay moist. I'm a little worried. I know roaches love humidity, and my baby domino roaches have been thriving well for 6 months now. I worry if my hisser died from not enough humidity? Do hissers require more humidity than other roaches? I do have a bigger enclosure tank that won't collect mold and can be misted down, the "graduation tank" for when baby insects get large enough to monitor, but these guys are not ready yet. What do you think? If they need to be moved, I will, it will just be a pain to monitor them. I have some vasiline too, so I can keep them at bay from escasping vents, but it's baby powderscented(I'll try to pick up regular tommarrow, it's just what we have laying around the house), I hope it doesn't bother them.