Looks like he's a Lyretail anthias afterall. The dominant female changes into the male over a period of around 2 weeks, then he'll harass the female for nookie all the time. Thats why they should always be kept in a shoal in a large tank (over 125 gallons). She'll never get a minute away from his advances being the only female. They're a bit like randy guppies, always chasing the females. If you can't have a shoal, one on its own would be kinder.