Carpet ID please

[Goby go]

Ok I hope I do not regret my purchase but could not resist. FYI it is in a 200 gallon tank so size isn't the big issue. Right now it is tiny "2.5 inches across" and I was told it will grow to about 10 inches. And this picture does no justice to the red or blue color of it, as it was taken with a flashlight after lights out. So please tell me what you can it is my first carpet but not first nem.

 

[ThRoewer]

They currently go under Stichodactyla tapetum, though I wouldn't be surprised if it turns out to be a currently undescribed species.

So far I have never seen them larger than 4 inch. Specimen slightly larger than a US quarter go in local stores here between $60 and $100.

 

[D-Nak]

Sounds like someone sold it to you as a "baby haddoni" but as ThRoewer stated, it's actually a mini-maxi anemone, currently described as S. tapetum. I agree that it should be classified as a different species.