yes, that is a sebae, a rather difficult specimen to keep alive, make sure its gets decent lighting and its in the and, not on the rocks as they like to bury there foot more like a carpet (IME)
if you are new to anemomnes, this mis labeling was an unfortunate mistake, i suggest you do one of two things.
1.) take it back and get your money or a real
BTA
2.) read your butt off and try to do everything ou can to keep it alive
to help you make sure you check out the
anemone podcast