Characterized by a distinctive white edge on their dorsal and anal fins, adding a unique touch to their appearance.
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Characterized by a distinctive white edge on their dorsal and anal fins, adding a unique touch to their appearance.
Betta albimarginata is a beautiful, peaceful wild-type Betta with elegant reddish-brown coloration and striking white margins on its caudal and dorsal fins. Males have more vibrant colors, while females remain subtler in tone. They are best suited to blackwater or low-light environments with plenty of leaf litter and soft acidic water.
2-3 years
Carnivorous; prefers high-quality Betta pellets or flakes, supplemented with occasional live or frozen foods.
A great choice for experienced aquarists looking to explore wild Bettas. Their peaceful nature, stunning color, and fascinating breeding behavior make them a prized addition to a well-maintained blackwater biotope.
Intermediate
10 gallons for a pair, larger for a group
6.0–7.0
1–10 dGH
73–78°F (23–26°C)
1.8 inches (4.5 cm)
Peaceful small species like chili rasboras, pygmy corydoras, and snails
Aggressive or fin-nipping species, large fast swimmers, Betta splendens
Betta albimarginata
Osphronemidae
Borneo (Indonesia, specifically East Kalimantan)
Pairs or harems; relatively peaceful compared to Betta splendens
They thrive on a varied high-protein diet. Feed frozen or live daphnia, brine shrimp, grindal worms, and mosquito larvae. Supplement with high-quality micro-pellets. Feed once or twice daily in small amounts.
Mouthbrooder; male carries eggs in mouth until fry are released
This species is a paternal mouthbrooder. After courtship, the female deposits eggs which are quickly gathered by the male into his mouth. He incubates the eggs for 10–14 days before releasing free-swimming fry. During this time, he doesn’t eat and requires minimal disturbance.
Soft, acidic water with stable parameters is key. pH between 6.0 and 6.8, very low hardness (1–6 dGH), and temperatures in the mid-70s°F. Use almond leaves, driftwood, and tannins to recreate natural blackwater habitat.
They are prone to stress in hard water or brightly lit tanks. Poor water conditions may lead to fin rot or fungal issues. A tannin-rich environment helps mimic their natural conditions and reduces disease risks.
Can be territorial and aggressive towards other male Betta fish. Best kept alone or in a species-specific setup.
Betta albimarginata are far less aggressive than domesticated Bettas. Males may spar occasionally, but serious damage is rare. They prefer calm, densely planted tanks and can be kept in pairs or harems (1 male with 2–3 females) in larger tanks.
Betta albimarginata combines the grace of wild fish with the charm of Betta behavior. For those ready to step beyond common Betta splendens, this species opens up a window into nature’s subtle beauty and evolutionary diversity. Their care is deeply rewarding when given the right environment and attention.