ID Please

[sammyw]

Could somebody please ID this thing on my LR?
It started kind of small but is now about 3/4 inch deep and 1/2 in wide. It has a small hole in the middle of it. I've been trying to locate something inside, but with no luck.

 

[theappe]

shroom? sponge? slime?

 

[memphis]

I don't know what it is but the rock is GORGEOUS!

 

[sammyw]

I have a TON of corraline on my rocks. They're almost completely purple. The weird thing is that my water parameters are completely out of wack right now too!

 

[the gift]

sponge i think?

 

[sammyw]

Here a pic of one of my rocks. I want to add more rock, but $ is tight!

 

[the gift]

Its a sponge and your corraline is stunning!

 

[sammyw]

Cool. Thanks. I guess I should just leave it alone?

 

[reefboys]

Yep, just leave it in there. Looks pretty cool and some lucky fish might get a nice meal out of it lol.

 

[sfoister]

Wow, it's like purple snow on a tiny, underwater mountain. I'm impressed.