Freshwater
Siamese fighting fish
Betta splendens
Osphronemidae, Macropodusinae
Facts
Characteristics
- Length
- Up to 6.5 cm
- Body shape
- Streamlined
Care
- Group
- Missing
- Smallest aquarium
- 11 liters
- Diet
- Missing
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Behavior
- Temperament
- Semi-aggressive
- Swims
- Missing
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Water values
Smallest tank
11 liters33 × 17 × 20 cm · For one fish
Worked out from its length, as we don’t yet know what size tank it should have. Do you? Sign up and tell us in the app.
Try other measures in the appNativeIntroduced
Lives wild in Cambodia, Laos, Thailand, and Vietnam.
Introduced to Brazil, Colombia, Dominican Republic, Indonesia, Malaysia, and Singapore.
Videos
I Filmed Betta siamorientalis Breeding Underwater in the Wild | Exploring Eastern Thailand EP3
Rodrigo SilvaAug 29, 2026
Snorkelling a Suspiciously Clear Rice Field | Exploring Eastern Thailand EP2
Rodrigo SilvaJul 24, 2026
All the fish species that I found in this ditch in Thailand!
Rodrigo SilvaFeb 16, 2026
Snorkeling a Rice Field: Rare Rasboras & Wild Bettas | Exploring Eastern Thailand EP1
Rodrigo SilvaFeb 13, 2026
Tank mates
More about the species
About the species
Occur in standing waters of floodplains, canals, rice paddies and medium to large rivers. Feed on zooplankton, mosquito and other insect larvae. Air breather and bubble nest builder. Used in behavioral studies. Males will fight each other. The many colorful varieties are popular aquarium fish, however, the holding of the males in very small containers should be discouraged. Aquarium keeping: sexes should be kept separate unless for mating, and that only one female should be brought into the breeding tank measuring about 20-30 L (http://www.kampffischnet.de).
Source: FishBase
Other names
In other languages
- Siamesisk kampfisk
- Kampfisk, Siamesisk kampfisk
- Siamesisk kampfisk
- Taistelukala
- Siamese fightingfish
Articles
All articles
Fin rot and columnaris4 min read
Bacteria that attack the fins, mouth and skin, nearly always after poor water. When water changes are enough, and when more is needed.
Velvet and dropsy4 min read
Velvet is a fast-moving parasite. Dropsy is a sign that something is seriously wrong inside the fish. How to recognize them, and what you can do.
How to set up an Asian aquarium5 min read
Two aquariums from Southeast Asia: calm forest streams and peat swamps with soft, brown water, and fast mountain streams with cool, oxygen-rich water.
How to add new fish4 min read
From the store to the tank: how to get the fish used to your water, why you should add only a few at a time, and what to watch for in the first few days.