Yeah it was either my Dusky or my monster serpent star. Either was possible, that dusky picked at EVERYTHING and ate many things it probably shouldn't have. All I know is they were there - I saw them daily, then they weren't and I haven't seen any in monthssssBoth me and @i cant think have a ton of wrasse and have also had huge issues with coral eating asterinas. One of my wrasse was a dusky too. Definitely did not eat the asterinas.
If you want a wrasse that eats them then I think you need a thalassoma wrasse but unfortunately they are very aggressive. My little 2.5” one has killed two urchins as big as it is.