Yes it is a condylactis and when it gets big and starts to eat all your fish you will realize what a great bargin it was. You should really research your livestock PRIOR to purchasing them that way you will know their habits and their needs and ensure that you will be able to provide what they need and that they will integrate into your tank well and be a good fit. I am not sure what you have in your tank already but remember that these are atlantic anemones and are not hosts to clownfish. A clownfish may host in it but eventually this anemone may just eat the clown.