Help with id please

[Kellie]

I just noticed a few things growing on the live rock was wondering if anybody could tell me what they are especially the white spike mollusc attached to the rock

 

[reef lover]

Sponges....

 

[Kellie]

Cool I thought that's what the pink thing was there's an orange one growing under the rock too...but the white spikes thing I have no idea it has a shell it looks attached to the rock but it actually raises the shell alittle sometime like its filtering the water

 

[reef lover]

Bivalve.

 

[Kellie]

Cool I only just noticed it this morning when it moved so thought I should ask to make sure it wasn't something I had to take out thanks