Alright, two ID's to figure out

I have this macro algae, I think, that just started growing about 2 weeks ago. Not sure what it is.



And I also have this thing growing just under my hammer coral. Looks like a pineapple.

 

dont know the 1st. but the 2nd as you said, is a pineapple sponge i believe.

 

Not sure on the first one, but the second one is a pineapple sponge, which are totally harmless

 

Second is a pineapple sponge. Harmless

First one looks like bubble algea with cyano lol

We all posted at he same time and same answer lol

 

Actually, that first one kinda looks like red bubble algae

 

As already said the 2nd pic is a Pineapple sponge. The first one is red bubble algae IMO. I'd siphon it out before they break and spread.

http://www.google.com/images?q=red ...esult_group&ct=title&resnum=2&ved=0CDUQsAQwAQ

 

I believe the first is a type of cyanobacteria, which can possibly be toxic to the tank, and the second is a pineapple sponge.

 

Red bubble algae, remove as suggest by ReefMonkey and pineapple sponge. The sponge is good.

 

Ok, thanks guys. Didn't know there was a red bubble algae. Learn something new everyday.