they are not a hosting anemone but clowns will probably try to at some pointe but it will probably eat them at one point ...i guess they are hit or miss...me i would trash it or give it to someone elsen
it's pretty much an undesired anemone--I had tried a couple when I first started out in the hobby, and they eventually died--don't know if someone here has been successful in keeping them-but I'm sure someone has---but if it were mine-I'd do the same favor your friend did you-give it away-or take it to LFS for a credit