Peaceful Betta
Betta imbellis
Also known as: Crescent Betta, Malay Fighting Fish
The gentler betta. Males can sometimes share a tank if given enough cover.

About
The Malay Fighting Fish (Betta imbellis) is the calmer, less combative cousin of the familiar Siamese fighting fish, and for hobbyists who want a betta with genuine personality but a somewhat more manageable temperament, it's worth serious consideration. Native to Thailand, Malaysia, Singapore, and Indonesia, it typically inhabits slow-moving or stagnant water. Paddy fields, lowland swamps, and roadside ditches where water can range from clear to tea-brown. Males are genuinely beautiful fish, with a dark body base of deep brown or black offset by iridescent blue finnage and a distinctive red crescent band along the tail's outer edge. That crescent marking is one of the most reliable identification features. Like all labyrinth fish, it can breathe atmospheric air, an adaptation that helps it thrive in low-oxygen environments. Despite its common name referencing fighting, it is considerably more tolerant than B. splendens. With enough cover, some keepers successfully maintain more than one male in the same space, though this requires careful observation. It is not really suited to a busy community tank, and careful thought about tankmates is necessary. This species is also a bubble nest builder, and its breeding behavior is complex and rewarding enough to interest anyone who enjoys a project. Wild-caught fish are often sold by locality name, which matters to those working to preserve natural color forms and bloodlines.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Peaceful Betta
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Peaceful Betta get?
- The Peaceful Betta reaches about 1.5–2.5" as an adult.
- What size tank does the Peaceful Betta need?
- A minimum of 11 gallons is recommended for the Peaceful Betta.
- What water parameters does the Peaceful Betta need?
- The Peaceful Betta does best with a temperature of 72–82°F, a pH of 5–7.5, hardness around 1–19 dGH.
- Is the Peaceful Betta aggressive?
- The Peaceful Betta is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Peaceful Betta eat?
- The Peaceful Betta is a carnivore. It needs a meaty, protein-rich diet of frozen or live foods.
- How long does the Peaceful Betta live?
- With good care, the Peaceful Betta typically lives 3-5 years.