Peaceful Betta (Betta imbellis) is an intermediate-level freshwater fish that needs at least 10 gallons and 75-82°F. A small wild-type betta with a shimmering body, a crescent-shaped tail and a gentler nature than the common fighting betta. Males still defend a territory against other male bettas, so keep one male per tank, and use a planted tank with floating cover and a gap under the lid.
Care facts at a glance
| Scientific name | Betta imbellis |
|---|---|
| Family | Osphronemidae |
| Origin | Malay Peninsula and southern Thailand |
| Adult size | 2.5 in |
| Minimum tank | 10 gallons |
| Temperature | 75-82°F |
| pH | 6.0-7.5 |
| Temperament | Calmer than a Siamese fighting fish, but males still spar |
| Social behavior | One male per tank, or a pair |
| Swim level | Upper to mid |
| Difficulty | Intermediate |
| Diet | Carnivore: micro pellets, frozen and live foods such as brine shrimp and daphnia |
| Typical lifespan | 2-4 years |
Quick tips
- Keep one male per tank unless it is large and heavily planted.
- Leave an air gap under the lid.
- Use gentle flow and quiet, small tankmates only.
San Diego water
Captive-bred stock usually adapts to San Diego tap water with slow acclimation. For best color and health, many keepers blend tap with RO/DI water. Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi