Wow! Someone should go over to your place with a HD camcorder to film this! Should be hugely interesting! Keep us posted, please.

jelly fish
 

they look like upsidedown jelly fish-they will grow to about 5/8 of an inch and are completly harmless-they feed on light and plankton but nothing i know of will eat them.if you have bright enough lights(metal halide or led)you can breed them and sell them to your local store.they will come back every year.i use to have them before my tank crashed and they are fairly interesting.they start out on a stalk under the rock and will eventually turn a translucent blue

Any update to this tank? the mantis with babies and jellyfish?

wow....
more pics please...

this could be a sweet thread to follow with such fresh live rock....

look on here for them
http://www.chucksaddiction.com/hitchworms.html

Well all but one jellyfish has disapeared. The one that has stayed has planted himself on a piece of live rock and become like a cone shape for the time being. It's growing rapidly and is now almost 3cm across. Unfortunately I can't take pics of it right now. I need a new cam. The mantis shrimp I have put into a coral tank with about 1" live sand and 3" lava rock on top for hiding places. The mother mantis is in the tank with the babies and all is good. they show themselves once in a while but mainly stay hidden in the daytime. They don't hunt my corals just my fish so I'm keeping all my fish out of the coral tank.

What kind of mantis shrimp?

The best guess at this point is that they are a Odontodactylus scyllarus - peacock mantis shrimp.

What kind of anemones do you have? I have seen Aiptasia reproduce this way before. The larval stage of anemones are free swimming until they settle.

These are most definately jellyfish. Most of them fell victim to the protine skimmer. The one that I can find has planted itself on a piece of rock and is inverting it's cone. They are a very nice translucent blue in colour.