I have had hundreds of those starfish and never ever had any eat coral or cause any other type of mischief. lol
Typically they are harmless, but I always hear people say they eat their corals.........I have no idea other than I have never had any issues with em.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.