What the heck is this cocoon???

All...
I have this really weird thing growing it seems like a cocoon of some sort.
I put a filter sponge that measures like 6"x3"x3" in the tank for a pod and little bug haven...It's been in there for about a year.
It's pretty cool I have spotted some tiny stars and lots of pods thriving in it.
I decided to move it and look under it and to my surpise found a cocoon looking thing with something moving in it.
It measures 2cm when we first saw it and then it retracted into the sponge after being disdurbed.
What is this?!?!?!?
:thinking:
:help:
 
Alright I moved the sponge to the fuge...I'll keep you all updated with anything new...I'm pretty sure it's a cocoon or egg case of some kind since I can see stuff moving inside of it.
 

lovethesea

Active Member
can you put it in fish discussion or reef? That way Bang or someone that loves the bugs and other creatures can maybe ID it. Very courious looking. :yes:
 
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