I have one like that.... It was sent to me as a replacement for a 40 dollar polyp of rainbow yuma that the shipper set a heatpack on in 85 degree weather. Needless to say im not thrilled to know that everybody and their brother has these after how much i paid for 1.
I do like them though, yours looks very nice! and yes the tenticls around the edge are normal and the way that one is reaching to the next rock is also normal, they look great to me.