They are the species Pseudoanthias bicolor.
I really haven't experienced the difficulty people speak of with feeding anthias. To be quite honest, the fish don't always eat every day. Basically I feed three times a week now.
Frozen mysis, and cyclope-eez of course, which is probably the anthias favorite.
I used to have a male and two feemales, but after a year, the male disappeared. I also drop in a pinch of omega flake food on occasion. But lately I've been using it more to get the cat to come...lol. The second i pop the top on that fish food, im attacked by my cat.