Sea stars and clams newbie question

[DiverGirl82]

I think I would like to have a sea star in my tank I'm working on setting up and I was thinking this one would be a good size for a 24x24 cube.

http://www.liveaquaria.com/product/prod_display.cfm?c=497+528+2133&pcatid=2133

But I also would eventually like to get a clam and was wondering since it says you can feed the sea star pieces off muscle and other meaty foods is there a risk of it bothering the clam?

I also love the color of this brittle star but I'm concerned it might end up being too big for my tank. Opinions?

http://www.liveaquaria.com/product/prod_display.cfm?c=497+528+575&pcatid=575

 

[Daytonareefing]

They both should be fine in a reef with a clam as long as everything finds food if not sometimes they start picking on stuff they would other wise leave alone.