Are these star fish or ???

[3425675765]

Might seem like snails from this angle. But it has multiple arms. But I just find it weird that they only come out at the eve if I turn of the light. And they only sit on my rock so are they star fish and should I keep them I heard they might eat corals...

 

[steve&mari]

They are astaria stars probably spelled wrong lol. But never had issues with white ones but blue/grey ones remove they have ate zoas of ours before. I know it's a debate in hobbyist about them. But I recommend to toss any that aren't white.

 

[KJ]

Asterina sp.
Microstar, Ministar

Suitability: Watch them!

Diet: Micro/film algae. Some varities rumored
to eat corals.

Remarks: Read More!

Look like this.