Any ideas?

[Ajholms0427]

I found this in my rock work before but it was much much smaller now it is getting huge and was able to finally get a picture quickly. Any ideas would be great and if you think I should be worried. It only comes out at night but never all the way out so I have no idea how big it is.

 

[Slimm]

Looks like a limpet. If it is, great hitchhiker and addition to your clean up crew.

 

[ultimatemj]

I think he's talking about creepy dark worm! Lol

Take a look at this article
http://www.reefkeeping.com/issues/2003-04/rs/index.php



Tapa

 

[Ajholms0427]

I don't know if it's a limpet. All pictures I find of limpets they have shells the thing in my tank doesn't have a shell. I tried to grab it with my tweezers last night but couldn't detach it from the rock.