Thanks for your advice, that's cleared a few things up

This is the best picture I could get

Will an adult male + female fight? I have plenty of caves + hiding places in tank but there has been a lot of aggressive fights over the last couple of days between about 5 zebs which I thought some maybe were females, the alpha male was not involved

Thanks I've just spent a couple of hours reading everyone's comments + there is some really good advice on here

I'm russ + new to this site, I've been keeping young zebs for over a year. A month ago I purchased 11 adults so will probably be asking you all for lots of advice over the coming months