light blueish starfish growing in my tank

[steeler2633]

i have these little light blue starfish growing in my tank can anyone tell me what they are. they dont seem to be doing anything bad or eating coral at all i have been finding them every week now

 

[flower]

Welcome to the site!

Greyish? Astria star I believe is what they are called..also I think they are harmless, I have a ton of them and they don't seem to bother anything.

 

[smartorl]

Are they mini brittles? They could be asterinas, they are usually identified by their assemetrical or missing arms. Rather than being spindly like a brittle, they are thicker and bulkier, more like the shape of a chocolate chip star.
Either type would be beneficial and a great addition to your cleanup crew!