Wow! That is crazy and somewhat amazing at the same time.Here are some I've pulled out by hand.
I used to be a big supporter of these guys. They do a great job keeping coraline in check. However 100% some eat my zoas and palys and it's impossible to tell by looking at them which are doing it.
I’ve tried those and they’re rarely on sale and they didn’t do nearly as good as the harlequinYou can also use a nordoa starfish. Their main diet is the small asternias.........you will run into the same issue with harlequins that once the stars are gone it will die of starvation.
I’ve tried those and they’re rarely on sale and they didn’t do nearly as good as the harlequin