One of the greatest things about starting a reef tank is getting your live rock in and admiring all the diversity within it. The rock comes to life different creatures. This is a guide that I, along with a very well known critter identifier @KJ , have put together for the new reefer on what...
I think they are kinda cool tbh. One of the few starfish that does well in home aquariums along with microbrittle stars. If you notice they are eating your coral then remove them but otherwise they should be fine to keep if you like them.