Id??? Starfish good or bad??

[tiaxchick]

Spotted this on the back glass this morning is it good or bad ? Never noticed it before looks cute ....

 

[fisherman08]

I have like 4 in my tank and doesn't seem to bother anything

 

[melosu58]

Asternia stars. I have many in my tank and they dont bother anything that I see. I have had them for 15 yrs now.

 

[nightowl2k]

Algea eaters,sont bother anything,but do reproduce..i like em..

Sent from my SGH-T999 using Aquarium Advice mobile app

 

[ezy33]

I just posted that the ones I've had for years decided my blue Daisy's are food for them or It's possible another strain came in on a coral. Keep a eye on them. Good luck!

 

[carey]

I have dozens of those stars and they are mostly harmless from what I can tell.

 

[mr_X]

I like this article about starfish-
Starfish: Considerations for the Common (and Commonly Misunderstood) Varieties by Anthony Calfo - Reefkeeping.com