Fat tiny purple starfish??

[ELBee]

I have asterina in my tank, but these little blue guys seem new and look a good bit different to me. No one seems to be bothering any corals. Any id on these little guys?

 

[Jikkermanccini]

In my experience, they are just a different life stage of Asterina. I've got both in my tank, neither cause issues and my nephews & nieces love seeing the 'baby starfish's.

 

[msporleder]

it might be different species and the blues have become dominant over the whites or pinks or whatever you had before