Originally Posted by Roka64
Correct me if I am wrong, but I think the Harlequin adult eats the Asternia and the little ones eat Linckias
AFAIK they all will eat the small asterina's, though I don't have direct experience myself either. I've heard of people using them when asterina's turned bad in SPS
tanks. If I remember right, the darker colored asterinas, greyish/black, are more likely to be a problem.
FWIW I came across an article about a seastar that will eat asterina stars.