I just tried to get the red sea star to eat some krill today, no luck. I'm sure he would eat it but he wasnt interested in holding on to it so it kept floating away. I even 'pinned' the krill under the sea star and he just moved away from it. Hehe. I hope he'll live a while, there's lots of stuff he could eat in my tank. I have lots of sponge too.... which I actually hope they wont eat.
Thanks for the comments everyone!
-Diana