can anyone ID this starfish?

[JennyGutt]

hello everyone. I was looking at my tank rock and noticed something moving and saw this. it appears to be a starfish.its very tiny. id say 1/2 inch diameter. is it a baby or just a small one? so much fun to find new things like this I have a common starfish could it be a baby? the one I have is brownish in color.

 

[Chefbill]

Asterina

 

[1Mjiggy]

Asterina and they eat corals.

 

[Chefbill]

Some SAY they do. There are many species and not all are coral eaters

 

[4FordFamily]

Asterina. Mine never hurt anything but they were annoying and as water quality worsened they reproduce like wildfire and are unsightly