ID What is this?

[fishkid13]

Sorry for the bad pictures, carma sucks and they are only located at the bottom of the sump.
Some of them seem to be spongy while I have a few that look like corals? I just noticed them today. I suspect they are dwell in the darks sense that is where they are all located. Thanks for any help.
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[meowzer]

Probably some type of sponge....but with the pics it's hard to tell for sure

 

[fishkid13]

Yeah, i was thinking it was spoange, but I have something that looks like the top of a xenia. ???

 

[pezenfuego]

Who lives in a pineapple under the sea?
Pineapple sponge perhaps. Dude, the pictures are sucky, but if I had to guess, I would go with that. Does it look like this?

 

[meowzer]

HEYYYY...That's a great pic PEZ....I know I had those sponges in my tank...lol...but didn't realize the top part did that...never looked close enough I guess
HMMM...That answers some questions ...THANKS