What are these tenticals growing out of my live rock?

[TankaLotMan]

Hi all I am trying to figure out what these tentacles are I just noticed them the other day and I have never seen them before.

 

[CODE3EMT]

Hard to see, but my guess is Sponges. Mine are growing all over my live rock and dark areas of my sump. They are harmless filter feeders.

 

[AlSimmons]

It looks more like an Aiptasia IMO.

 

[GimpyFin]

Looks like aiptasia to me as well.

 

[Reefiez]

worst nightmare, aiptasia imo

get into battle mode and get rid of it FAST!

 

[ReeferNoob4ever]

Do the tenticals come to a point or do they look like a cylinder and have a hole going inside? If they are pointy it's likely aptasia. If they have a hole on the tip going inside and are cylindrical it's a sponge.

 

[mcgyvr]

I'm in for the aiptasia vote too..

Google "aiptasia" for images to confirm..

 

[protie]

Having just dealt with aptasia, I have to vote aptasia as well.