Some type of star fish .??? Id pls?

[benjadeed]

Hi, while cleaning my overflow chamber I found these inverts they resemble like six legged starfish... Some of them have only 2 legs... is it parasitic or can they be in the reef tank...

https://picasaweb.google.com/m/phot...7958651517922&aid=5491775807548997777&start=3

 

[Sugar Magnolia]

Micro brittle stars! Excellent little hitchhikers.