Is it possible that these were once PPE's or PE's of some kind? They have the green mouth and purplish centers, and under just actinic's the skirts have a green tint to them.
I got them from a LFS. I got a bunch of corals that were unattached floating around the bottom of the tank (for $1).
I'm thinking they just lot there color.
Any idea's or inputs would be great. Thanks.