Crab and clown sharing a nem?

I added a porcelain anemone crab to one of my tanks yesterday with the hopes of it living in one of my mini-maxi carpets. Instead, it's decided it wants to live in the LTA that hosts my maroon clown. The LTA is only maybe 3" across and the clown is about an inch, so both tiny. Well, the crab is about the same size as the clown and sucking up all the limited space. The clown is just trying to snuggle in on the very edges. I never thought I'd actually feel bad for that evil little maroon...

My question is... how's this going to turn out? Is the clown going to lose it and rip apart the crab? Is the clown going to be missing part of his tail sometime soon? Can they actually share? If not, how long do I have before things get ugly?