Bad Starfish

[REDNECK_REEFER]

I have these little starfish with multiple arms, theyre about the size of a quarter. I don't know if they're bad or good Any body know?

[VFX]

They're Asterina starfish if they look like this...

http://www.wetwebmedia.com/EchinodermPIX/Asteroids/asterina_id_wwm_1.jpg

A nuisance rather than harmful pest.

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[Drock169]

some species can eat coral

[Zoaelite]

Its most likley Bristle Stars, nothing to worry about we will need the color to make a positive ID though.

[Brent F]

some species can eat coral

A fairly reliable way to tell the difference is if they are on the glass they are probably harmless. If they are on your SPS they probably eat coral