Betta (Male)

Betta splendens

Betta (Male) (Betta splendens) — Intermediate care, Semi-aggressive, under Betta. Minimum tank in the app: 6.6 US gal min; aim for 72–86°F and pH 6–7.5. The male Betta, a vibrant and captivating species, is ideal for aquarists looking for a visually striking centerpiece fish.

Betta (Male) (Betta splendens) in a planted freshwater aquarium
Care levelIntermediate
TemperamentSemi-aggressive
Min tank size6.6 US gal min
pH range6–7.5
Temperature72–86°F
Max size3.0 in (7.5 cm)
Captive lifespan3–6 years
SchoolingNo

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.

Natural distribution

Southeast Asia

  • East & Southeast Asia

Regional colours match the stocking calculator’s origin map.

Betta (Male) Tank Setup

Create a dynamic layout with floating plants and taller decorations to provide both cover and swimming space, focusing on the top and mid-water zones where they thrive. Use subdued lighting to mimic their natural habitat, and ensure a gentle water flow, as strong currents can stress them.

What Do Bettas Eat?

Feed a varied diet of high-quality micro or live foods, as Bettas are opportunistic feeders that thrive on protein. Rapid feeding may trigger competition; ensure they are not overfed, which can lead to health issues and dull coloration.

Betta (Male) Tank Mates

Best paired with larger, non-aggressive species that occupy different swimming zones, such as certain tetras or rasboras. Avoid small fish or slow-moving species, as they may be seen as prey. Intraspecies interactions should be limited to one male per tank to prevent damaging territorial disputes.

Are Bettas Good for Beginners?

We rate this as intermediate. Budget time for testing, maintenance, and watching behaviour if the water looks fine but the fish do not. Aquarists often underestimate the Betta's space needs and aggression, leading to conflicts or stress in overcrowded or poorly planned tanks. Ignoring water parameters can also lead to health problems, as Bettas are sensitive to pH and temperature fluctuations.

Guides that pair with this fish

Browse species guides · Water parameters cheat sheet

Building a community? Run the full list through the stocking calculator before you add anything else.

Log tests and reminders in App-aquatic—free, same data you see here.