Emerald crabs and stylos

So I have caught emerald crabs on stylos several times now. Are they eating it or what is happening the large stylo i have had as long as I had the crab which is about i moths but never have seen any dmg the small stylo is in a separate tank with a different crab which I have caught several times but again I see no real dmg. Any thoughts

Mine like to hang out at the base of various corals. From my experience emeralds won’t go after corals unless there is nothing else to eat. Many would disagree but that has been my experience. No damage. I wouldn’t worry about it.