Need Help to ID Hitchhikers Please

Ok, so first pic is a little reddish snail, and what looks like a porcelain crab? WOOT I have my first hitchhikers!!

The other 3 pics are horrible pics (camera giving me macro attitude, will try for better ones) are of some sort of clam/mussel/thing. Its about 2 inches across, and has an open mouth with tiny tiny teeth. Its whitish, and has light light green cabbage looking tentacle-growth all over it. It is BIZARRE looking - any ideas?

You can also see it in the pics in my reef log - link in signature...

Thanks!!!

ya, I had a hard time getting these pics, let alone better ones...should I remove the scallop thing or is it one of those filter feeders that wouldn't harm anything? And if so, my tank has only been cycling for 2 days - should I be feeding it something or adding anything else or just let nature take its course? The mouth doesn't go all the way around like I would expect with a oyster/clam, it looks like a nickel coin slot, with itty bitty teeth...

As for the crab, you can't see in the pic, but what looks like solid orange is actually yellow with fine red markings - and the claws are white with red dots/stripes on it, looks almost exactly like a pic of a porcelain crab I have in a book of mine...

sweet - thx