Advertisement 2 weeks ago I removed a sac that had been suspended in my female Monocentropus balfouri tank. It was unopened and had 2 nymphs and 7-8 viable eggs-with-legs. After I removed them within days the nymphs died (within 3 hours of one another) and the rest went bad. Needless to say I was quite choked... until now. That is one of several I saw in the burrow. I speculate that these are from another sac I did not see hidden in the burrow and judging by the size of the slings was laid within a week or so of the one I removed. Once again the one I removed was not opened and was still packed quite tightly with no visible tares. It has been noted that M.balfouri produce smaller sacs, yet do not take great care of them. They are not protective like some other African species. In captivity, few breeders pair them up with the males for long or with more than one mate. I left 2 males in with her for months. Perhaps M.balfouri do not protect their sacs so vigorously because they produce more than one in one mating cycle if they have copulated enough to produce higher amounts of eggs. The hammock sac allows them to produce multiple chances for young to survive without expending energy cradling a singular sac. Any other theories?