I have not seen an anemone that color before, may be purple dye. The base looks white?
Some anemones will refuse food for over a week if aggrevated by aggressive feeding. Some like minced food, others solid peices. Make sure to thaw in tank water. I successfully feed krill, silverside peices, formula one pellets, and even flake food. The trick with the latter is to soak so that the flavor is available to taste. If it doesn't eat give is a few days before trying again, or it may learn to be defensive to your attempts. When trying new food watch for a long time to make sure it doesn't puke it up to shrimp or crabs with out your knowing.
You can also try mysis, brine, cyclopeze, baby brine, etc., but mine all like solid chunks or processed food. Try different times of day as well, morning, highest light, after lights out or right before. Good Luck.