I'll give you some tips if you remember to ask the LFS if that anemone came in from a customer, or a new import. :rotflmao: I'm just kiddin. I bet someone returned it to the LFS for some reason. I can't see one of these anemones making it to the states in such good condition.
Your anemones name is Heteractis crispa. There's no such thing as a "sebae" anemone. It is typically a sand dwelling species, so if it is not attached, I would dig a hole beside a rock, and place the anemones foot in it. The anemone should attach to the rock or glass bottom, and begin sliding its foot under the rock. I would back fill the hole leaving nothing but the polyp exposed. If the anemone is attached, don't try to move it. Most people will say feed it once a week or something like that. IMHO, its better to feed small amounts every day when you feed the fish. Give it moderate flow and good quality lighting. If you take care of that anemone, it should out live you.