wow your tank already sounds sweet! i love the weird inverts. never did understand why so many people hated sea spiders. I think they look pretty cool. and that guys camouflage is great too. took me a while to find him in the pic.
hehehe sounds like you've got the beginnings of a mantis community! unfortunately the mantis fry (if that's what they are) will almost certainly die for various reasons. oh well, what can ya do?
are you sure they're not pods? here's a pic of a mantis larvae at different ages...
http://www.imagequest3d.com/pages/cu...stomatopod.htm