Need ID for snowflake looking thingy...

Deffinatly a sea star of some sort, perhaps a basket star?

probably a weird tube worm, i've had those pop up from time to time mostly in my sump. never see them too long though.

Looks like a basket star or feather star

Not a star. I have a worm that looks exactly the same like an evil feather duster.

harmless feather duster

cucumber

almost looks like the appendages of a cucumber, but lacks the body... haha