What do you mean Rooster? Cirrhilabrus Filementosis or Flasher wrasses, if so there are a lot of flasher wrasses. If your talking about C. Filementosis then they get a little over 3" long and they are planktivores so they'll eat brine, mysis, and plankton...and they can be taught to eat pellet or flake. You might want to ask H.Tanaka about them for more info since I believe he frequents this site and is the expert from what I can tell.