How do I sex Julies (Regani)

I have 5 Julies (Regani) and don't know what sexes I have.
I would also like to know what ratio should I keep. I have them in
a 55gal. with a 4 male peacocks, 3 orange leleupi, and 2 blue dolphins.

Bigger ones are usually female. They pair up and take over a territory, then they fight off anything that goes near it...including other julies. Keep them in pairs per 20 gallons. in a 55 you can keep 2 pairs, just be careful when it comes breeding time...thats when they are really territorial.

h0ngkn0t2 wrote:

Bigger ones are usually female. They pair up and take over a territory, then they fight off anything that goes near it...including other julies. Keep them in pairs per 20 gallons. in a 55 you can keep 2 pairs, just be careful when it comes breeding time...thats when they are really territorial.

But they're all the same size.Sturatgranti mall Island About 3- 3 1/2". 1's only 2"

I posted pics under SHOW & TELL. LMK what you think.

Its hard to tell when they are young. the females will look a little diffrent aswell as being bigger.