lots of IDs on one rock

[spkdtch]

first off, this rock came out of a mushroom display tank, a previously identified crab was hiding in the rock and i wanted the crab, got the crab for free, just paid for the half pound of LR
my guesses:
red -- some type of mushrooms, eventho they look like rics sometimes, not under proper lighting im assuming so they will die, just curious
blue -- some sponges
yellow -- bad pictures, but looks like a small feather duster or something similar, doesnt move, imbedded in the rock
green -- what im really interested in, some form of mollusk, thought it was a hunk of shell just stuck in the rock til i went to poke it and it closed, when it opened, i saw a small tongue/worm like thing moving inside the shell, never came out though
please identify all with specific names if possile
ie, not just a sponge, but what type, thanks!
first pic shows the mollusk thing closed, second is as open as it ever gets

 

[spkdtch]

43 people have looked at this and not one person knows what any of them are?

 

[teresaq]

The red does look like mushrooms regrowing. What kind of lights do you have??
Yellow does look like featherduster
Blue, not sure, I get them too, thought they were egg sacks, but could be sponges.
Green, clam or mullusk, just leave it, it will filter feed.
T

 

[spkdtch]

i dont have coral lights or anything, just a fixture from menards, 2 45w 48" long bulbs, 5100k
and i wasnt gonna move it, just curious what it was, its very neat, wanted to find more pictures of it
as far as the egg sack things, i thought that too, but nothing has hatched and they are on both sides of the rock, would be curious if they were eggs, what kind

 

[renogaw]

yellow looks like forineferans (or how ever you spell those things)
clam looks like a turkey wing clam

 

[nw2salt08]

The blue are definitely sponges. As to what type I dunno. I have them in my tank. I do know that they aren't pineapple/q-tip sponges.

 

[spkdtch]

noticed today that they have thin whispy tentacles, similar to corals sweeper tentacles, didnt know sponges had that?