Any ideas what these are?

[shogun1964]

I woke up this morning and found this thing stuck to the bottom of one of my live rock, i tried to remove it but its really holding on tight. The fuzzy white ball seem to be growing, any ideas?

 

[Tahoe61]

White ball sponge in the 1st image, harmless.
Second image looks like a bivalve, but I am not certain because of the angle of the image.

 

[shogun1964]

White ball sponge in the 1st image, harmless.
Second image looks like a bivalve, but I am not certain because of the angle of the image.

what is a bivalve?

 

[nemo1017]

I don't know what that one on the bottom is, but that yellow one is a sponge. It is good.

 

[nemo1017]

Bivalve is that clam looking thing in your bottom picture

 

[shogun1964]

Bivalve is that clam looking thing in your bottom picture

Really!This is a new tank about 2 weeks old, thanks for the info

 

[Sir Chris]

Ya sponge. It's really benifical expecally tubes

 

[reef lover]

Bottom pic resembles a bivalve...

 

[Lionfish Lair]

It looks like a Turkey Wing Clam.