This is an old standby – Eagle Eyes. The medium polyps have a red face with a dark outer ring and mouth, and a bright yellow-green skirt. This is a fast growing variety that develops its best colors in high light.
Like all zoanthids, these like plenty of nutrients, and will thrive in a wide variety of light and flow levels.
The frag you purchase will come from the same lineage as the image shown, and will have a similar number of polyps, but because of natural variation among frags yours may not look identical to this image.