Help ID this wierd Anenome thing

[chaosfyre]

I thought this might be aptasia, but google search shows me that aptasia looks different. This thing hides in dark places, and I've found it under a couple rocks. Ew! What is it, and should I be worried? Also, I am seeing these spider-sac looking things attached to some of the rocks. Are these little sponges? Or snail egg pouches or something? I recently started feeding coral vitamins weekly and since then my coraline algae and corals have responded well, but apparently some other things are liking it too....
On a different rock, I also spotted tiny tentacles, look like feeder arms of coral, or baby aptasias maybe. Today those weren't there though. They were on a piece of rubble that I glued a poisonous coral polyp to. I was hoping the polyp would kill them. Maybe it did.
What are the white spots all over the rock? Little barnacles maybe? Maybe the barnacles were responsible for the feeding arms..?
You can see one spider sac thing to the right of the anenome type thing. I don't have pics of the microscopic "feeding arms".
.

 

[manners]

Spider sack thing looks like a sponge, I have tons of them in all my dark crevices and under all the rocks also they grow in my canister filter.
Hard to make out what that aptasia looking thing is though

 

[flower]

Hi,
Unless it's some weird mutant (and anything is possible), but I don't think it's aptasia.

 

[deton8it]

Quote:
Originally Posted by Flower http:///t/395074/help-id-this-wierd-anenome-thing#post_3516690
Hi,
Unless it's some weird mutant (and anything is possible), but I don't think it's aptasia.
Ditto, all I see are Sponges.
John

 

[chaosfyre]

Thanks everyone. I didn't think it looked like aptasia, but it really creeps me out.. I hate that pale flesh color, cause it reminds me of mold or something. And the fact that it grows in the dark makes it even more creepy/gross like mold. Yuck. If its just a sponge though, I guess its good that its cleaning my tank. Can't think of what else it would survive off of since its not photosynthetic and doesn't have feeder tentacles. It looks a bit like an anenome... or some kind of spikey coral.

 

[flower]

It could be some kind of tube or rock anemone. They are nocturnal, and stretch out for food at night. Do you see a disc, or is it way too deep in the rock to see for sure?

 

[chaosfyre]

As far as I can tell, there is no disc... I didn't see anything except for those spikey tube arms. That doesn't mean there isn't one though. I haven't seen any feeder arms either, but I never checked it at night or right after I feed the tank. I think a tube or rock anenome is probably the best guess so far.