Freshwater
Krabi mouth brooder betta
Betta simplex
Osphronemidae, Macropodusinae
Facts
Characteristics
- Length
- Up to 8 cm
- Body shape
- Streamlined
Care
- Group
- Missing
- Smallest aquarium
- 19 liters
- Diet
- Missing
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Behavior
- Temperament
- Semi-aggressive
- Swims
- Missing
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Water values
Smallest tank
19 liters40 × 20 × 24 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 appNative
Lives wild in Thailand.
Videos
Deep Blue Springs & Critically Endangered Bettas | Exploring Southern Thailand EP1
Rodrigo SilvaDec 18, 2025
Betta simplex - Exclusive Underwater Footage - Critically Endangered
Rodrigo SilvaJun 27, 2025
Fish Species Found in Thailand’s Mystical Blue Springs – Bettas & More!
Rodrigo SilvaNov 3, 2024
More about the species
About the species
Inhabits limestone streams and marshes. The type locality was described as a pool of 10-15 m diameter, up to 10 m deep and the species was collected along the banks. Water data reported was 27 °C, pH 7.0, electric conductivity 530 µS/cm. Examined specimens were collected in a comparatively fast flowing, clear-water creek and were found between plants. Carnivorous, feeding on zooplankton and insects.
Source: FishBase
Other names
In other languages
- Safirfinnet kampfisk
- Mustasaumataistelija
- Krabi Mouth Brooding Betta
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.