What hitched a ride on my rock?

[Bradley Keck]

Ok. So I have tried to ID everything I find on my rock, but cannot seem to find pics of these two. The one came on my GMP rock. It's white and about the size of nickel. The other thing that is shaped like pineapple looks to have little finger projections at it's opening. They were on the cured Pukani I purchased and scattered about on most of the rock. anything I need to worry about? they both seem like harmless filter feeders.

 

[Jzndvd]

Not sure about the first on but the pineapple shaped thing are pineapple sponges. Harmless filter feeders.

 

[Bradley Keck]

Cool, Thanks!

 

[reef lover]

Yup sponges

 

[Bradley Keck]

Yup sponges

Right on. No worries then! Thanks!