Bettas have a reputation as solitary, even aggressive fish, and for male bettas that reputation is well earned. But female bettas are a different story. With the right setup, a group of female bettas can live together peacefully in what’s known as a “sorority” tank. Here’s what you need to know before setting one up.
What Is a Betta Sorority?
A sorority is a small group of female betta fish kept together in the same tank. Unlike males, who will almost always fight if housed together, females establish a loose pecking order and can coexist, provided the group is large enough and the tank is set up to reduce territorial disputes.
How Many Female Bettas Should You Keep Together?
As a general rule, aim for a minimum of four to five female bettas in a sorority. Keeping just two or three often backfires, as it allows one fish to single out and relentlessly bully another. A larger group spreads out aggression more evenly.
Tank Size and Setup
A sorority needs more space than a single betta. We’d recommend at least 20-30 gallons for a group of five, heavily planted with plenty of dense vegetation, caves, and decor to break sightlines and give each fish somewhere to retreat. Broken sightlines are the single biggest factor in reducing squabbles.
Signs of Aggression to Watch For
Even in a well-set-up sorority, keep an eye out for torn fins, one fish being chased constantly, or a fish hiding and refusing to eat. If you spot persistent bullying, the target fish may need to be rehomed separately.
Choosing the Right Female Bettas
Introducing all the females at the same time (rather than adding one to an established group) helps prevent a single fish being ganged up on. We stock a rotating range of female bettas, so it’s easy to pick up a full group in one order.
If you’re just getting started, take a look at our Betta Fish Care Basics for general water and tank requirements, or read our companion guide on Male Betta Fish Types if you’re weighing up a solo male instead.
For more on looking after your betta, see our guide to choosing betta tank mates.