These are certainly not 'pods' as most of us know them. Actually, they look pretty much like the mantis fry in that link. Here's my best shot of one.
They hang onto the branch with their back end. It's pretty much impossible to get a really good picture of one as the coral moves about in the current. In this shot, it is dead centre of the frame, leaning toward 10 O'clock. You can see both of the large raptorial appendages that lead me to believe that is what these are. This critter is probably 7-8mm long.
The sea spider also gave me a better pose. Here it is again.
__________________
400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank:
http://www.canreef.com/vbulletin/showthread.php?t=28436