are these sponges?

[wells284]

are these sponges that I have? They are popping up all over the tank

http://i748.photobucket.com/albums/xx126/wells284/822cfd4c.jpg

[billdogg]

sure looks that way to me. benificial filter feeders. leave them be

[coralmojo]

yes, sponges...beneficial filter feeders...let them be!

DrMerle

[DC_40gallon]

yeap their called pineapple sponges. It's the sign that the tank is maturing nicely and they are, as stated above, a filter feeder. Don't freak out if they suddenly start to brown, shrivel and die out entirely. This is all normal on the cycle of long term maturation.

[spleify]

They look like zoanthids to me.......





































Oh, they other things......yeah those are sponges.

[dudley moray]

sea squirts ??? sponges ??? tunicates?? either way they are not harmful !!

[Big Country_IL]

Sponges...have one approaching golf ball size in one of my tanks...neat looking

[Juruense]

Wow those sure are nice looking ones, mine are just a dark brown not a nice shade of green like that!

[Elysia]

I've never heard of those sponges being referred to as pineapple sponges before. I always heard people call those tubular calcareous sponges that -- the ones that are usually cream colored. Damn common names.

[spleify]

They don't look like pineapple sponges

[Josh72836G]

I've heard them called pineapple sponges before. Gotta love how many common names something can have. And +1 on the ID