Odd Sponge ID?

[DannyTC]

For some reason my tank has exploded with tons of different sponges. I have a bunch of ball sponges, some neon yellow ones and some pineapple sponges but this one seems odd. It's about the size of a half-dollar, it grew in less than 2 weeks and all of the chambers route to one central tube. Is that normal?

I'm new to reef tanks and just figured I'd share it and see if anyone has insight on sponges they would like to share.

 

[Alavaster]

My old tank used to have a ton of spiderweb looking white sponges and little yellow ball sponges. They were great! and usually took to the backs of the rocks. So as long as they are not competing with any corals (which they shouldn't) then they are a great bit of friendly filter feeding diversity to keep in your tank!