Bartlett Anthia females keep turning into males

[DanCorals]

Hi Everyone!

I have a 650G reef aquarium with a number of fish including Lyretail and Bartlett Anthias. Specifically, I have been trying to keep a 5:1 ratio of females to males. I am having an issue because I already had a second bartlett anthia change into a male and the two males are now fighting when they cross each other. This week, I noticed a third bartlett anthia female begin to change color / shape. Is there a correct ratio of females to males based on tank size out there anywhere? I always thought the presence of a male in the tank would keep the sex change under control. Any ideas would be appreciated!!

Dan

 

[FishN00b83]

I read one theory some where that it has to do with space in the tank. Im not sure if its true or not, but if they feel like they have enough for a territory theyll change and hold an area down?

 

[ca1ore]

I started out with one male and three females in my 265. Ended up with one female and three males (though one of the latter jumped). I'm inclined to agree that with too much space they are more likely to turn male.