look them up on this site. they are under the "goby" section. i have the yellow and red kind. i really like the purple kind too, but i don't think they do as well in pairs.
I already said this on your other thread in the reef section, but I'll say it again in case you didn't read the other...
Anthias are open water swimmers...
and they are much more active and colorful than cardinals.
Dispars or Lyretails are your best best, but Lyretails are hardier.