yeah, i would say unhappy BTA too. If I remember correctly, BTAs are the only anemones that have stripes around their mouths. He doesnt look that bad...the little bleached one behind it looks in need of more help. Good light and feedings of shrimp and other meaty foods. And good flow, but not too powerful that it hurts it. BTAs usually find the spot they like best.
HTH
Good luck