Need Advice On Feeding My Anemone

[Nicole_Shannon]

I bought a sea anemone a couple days ago and it seems healthy and happy until this morning when it closed-up. I thought it was dead but has since re-opened. I forgot to get food for it, if I go to the grocery store what can i buy to feed it?

 

[aberdeen aquarist]

Seriously? You need to research animals before you buy them. Anemones are difficult to keep for even experienced marine keepers.
Whatsizeis your tank, how long have you had it, what else is in it?