Echinaster sentus - common seastar

[Europhyllia]

I think that's what makes keeping seastars so challenging. In a lot of cases the diet of the seastar hasn't been clearly identified (hence they live for a few months and then die).
Some are supposed to eat 'bacterial film' (like Linckia), others definitely are predators for larger items (think chocolate chip sea star), some sift the sand for microfauna (sandsifting sea star)
Per the collector's description the Echinaster readily accepts small items like clams and mussels so would be closer to a predatory seastar than a microfauna eater and easier to keep a live and feed than a don't-know-what it eats seastar.
So my concern is how predatory would it be.
That was my question... ;)

http://www.reefkeeping.com/issues/2004-12/rs/index.php