Things on FL Live Rock

[VR28man]

Looking to help ID some hitchikers on KP aquatics live rock that's been in the tank for 6 months.

At the bottom of some rocks (definitely cryptic zone creatures):

Anyone know what kind of snail this is? This one was definitely a hitchiker, and I've watched it grow.

 

[Dancingmad]

I see sponges and what looks like little oysters to me in the first two pics. Not sure about the pinkish thing being zoomed in on or the snail.