It is a bubble tip which is very bleached, he main thing that causes a BTA to "bleach" or lose its coloration is lack or sufficient light killing off the symbiotic algae in its tissues. Such a condition if not remedied will eventually cause for the anemones demise. What lighting do you have? At this stage it will slowly waste away. With good lighting, preferably MH, and pristine stable water conditions, and some small feedings, you might have a chance to save it. I would take it back.