Not good starfish?

[CoralReeForrest]

Are these starfish reef safe? Two showed up yesterday not sure if they are asterina or not.
Pic

 

[dragonfly1972]

Yes, asterina. Some are harmless and some are known to eat some corals. They usually hit pocci' s and stylo' s first. I have some that haven't touched anything and some (Brown on top) that have devoured corals.
There is a good article on garf.org about different varieties, the good and the bad.