What are these?

[RRReef]

Hey all,
I could use some help identifying two hitchhikers. The two pics are both within the first chamber of my sump. The first picture is attached to the leg of my reefmat 250 and is about the size of a marble, and the second picture has the red circles around what I'm trying to identify (you can also see spirorbid worms which I'm familiar with, it's the more rectangular shapes I'm not sure of).

I've noticed what I'm almost certain are a couple pineapple sponges hiding in my gsp in my display, are the items in the red circle just much smaller versions of that?

Thanks in advance!

 

[ISpeakForTheSeas]

All of these are sponges; at least some of the ones in the red circles are pineapple sponges, but some of them might be different kinds of sponges (I don't see the "crown" of the pineapple sponge on some of them, and they look like they might start branching out more, but I can't say for sure). Regardless, all should be harmless filter-feeders.

 

[RRReef]

Great, thanks for the response!