Edit Betta raja
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Name
Scientific name
Betta raja
Described by
Authority Tan & Ng, Year 2005
Family
Osphronemidae
Common names
Not recorded
Photograph credits
All 2 credited
Summary
Betta raja is a mouthbrooding labyrinth fish endemic to Sumatra, Indonesia, found in the Batang Hari and Indragiri river basins. Before its…
Size and aquarium
Maximum size
70mm, standard length
Aquarium size
Minimum length 80 cm, Minimum depth 30 cm, Water movement Low: still or sluggish water
Water
Water conditions
Temperature 22–27°C, pH 4–7
Hardness
0–10dGH
Conductivity
Not recorded
Behaviour
Temperament
Species tank only
Social needs
Not recorded
Community suitability
Not for a community
Where it lives
Countries, regions, rivers and lakes
Indonesia, Sumatra, Batang Hari, Indragiri
Writing
Etymology
Not written yet
Distribution
Endemic to parts of the island of Sumatra, Indonesia. The type specimens were collected from a stream named Ayer Merah which is a tributary of the Danau Souak …
Habitat
Found in lowland forest swamps containing both clear and black water. Presumably it prefers the type of habitat favoured by most other Betta species ie. shaded…
Aquarium size
An aquarium with base measurements of 80 ∗ 30 cm or equivalent is large enough for a pair or small group.
Maintenance
Can be maintained in a fully-decorated aquarium although many breeders prefer not to use a substrate for ease of maintenance. Driftwood roots and branches can …
Water conditions
Temperature: 22 – 27 °C pH: Values over the range 4.0 – 7.0 have been recorded in its natural waters. Hardness: 0 – 10 dGH. Captive-bred fish have spawned in w…
Diet
Likely to prey on insects and other small invertebrates/zooplankton in nature. Captive fish will normally accept dried products once they're recognised as edib…
Behaviour and compatibility
Not recommended for the standard community set-up for reasons already touched upon. It's requirements and disposition mean it's best kept alone or with very pe…
Sexual dimorphism
Males grow larger, possess a greater amount of iridescent scaling on the head, a broader head shape, and more extended fins than females.
Reproduction
Paternal mouthbrooder. Ideally organise a separate tank for breeding purposes, unless the fish are already being maintained alone, setting this up as suggested…
Notes
Prior to description this species was widely misidentified as Betta fusca. It's included in the B. pugnax complex of closely-related species within the genus, …
References
References
4 on this profile