It does look like a xenia but it’s adjusted to the tank yet because it’s not “open” in good, healthy fashion. Give a few days and let’s see another picture. In that time you’ll also see if it pulses or not
Welcome to the site! Most users are going to drop by just to say welcome on the this sub forum fyi! It’s a shame.
Also , you don’t have to do anything I say, of course, but you might regret having your rock in the background so close to the glass. I taught myself the hard way that it’s nearly impossible to clean glass if I don’t leave enough room for my hand or handled-scraper to fit comfortably. Do with that what you will! It can always be fixed later