hitchhiker on rock with zoa

[Mine.Mine.]

Hey guys, I am at a loss as to what this is. Its on a piece of rock That has a zoa colony growing on the topside, Ans this on the bottom. There a a few little white puff looking things, with hairs sticking out at the too. Mostly on the underside of the rock, but I did suck one off the top to get a closer look. Can anyone offer any suggestions? I did see a little baby snail (I am guessing) scooting around but couldn't get the camera quick enough.

 

[herp_mommy]

I had the same white ball things. I was told they are harmless pineapple sponges

 

[joy13]

Those are harmless filter feeders sponges nothing to worry about and are actually helpful.

 

[Mine.Mine.]

Good deal, hate that I sucked one up then. Its just amazing to me what new things pop up over the months