What is this on live rock?

[snupa]

Hello, I recently purchased some cured fiji live rock and after about 6 days in the tank I noticed these bubbles of slime. Does anyone have any idea what it is? Should I be concerned?

 

[Ace25]

Looks like some type of Tunicate to me, filter feeders that are harmless, if that is what it is.

 

[snupa]

Wouldn't it have a mouth or an opening tho?

 

[Ace25]

Eventually those will show more if it is a tunicate. Since the rock was moved around a lot and recently placed into your tank it may take a little while for them to show their true shape. I could be wrong though so if others have a suggestion on what it may be, please chime in.

 

[snupa]

Its almost as if something was hatching in there ill try to post a few more pics

 

[greech]

The one on the bottom almost looks like a really bleached bubble tip anemone.

 

[wrek]

Those are just sponges aren't they? I have a bunch on my fiji rock as well.

 

[snupa]

They look a little slimy. Any chance these might be harmful for the tank?

 

[Fishfriend1]

I dought it. Just watch them and see what happens.