Looking for info on this cool starfish...

[naesco]

Myka is right. By purchasing an impossible to keep species all reefers do is to encourage LFS to bring in more that end up dieing in our tanks.

The starfish pictured is likely a neoferdia glyptodisca.
It lives at 33 meters so, if you have a cool very dim reef set up you might meet this requirement.
Nothing is known about it feeding requirements.