Betta burdigala, commonly known as the Red Brown Dwarf Fighter, is a rare, small-bodied species of wild betta endemic only to Bangka Island, Indonesia. As of 2025, it is classified as Critically Endangered due to severe habitat loss from oil palm plantations and tin mining. Physical Characteristics Size: One of the smaller wild bettas, typically reaching only 0.8 to 1.5 inches (2–3.8 cm) in length. Appearance: They are known for a deep, wine-red body color (resembling Bordeaux wine). Males: Display vibrant red-to-brownish bodies with intense greenish-blue iridescence on their flanks and a large dorsal fin when in breeding condition. Females: Usually have a blander red color and a visible egg tube. Aquarium Care and Water Parameters Water Conditions: As blackwater specialists, they require extremely soft, acidic water. pH: 4.0–6.0 (ideally below 5.5 for breeding). Temperature: 75°F to 82°F (24°C–28°C). Hardness: Very low; typically 0–90 ppm. Tank Setup: A minimum of 5 gallons is recommended for a pair. The tank should be densely planted with low lighting and tannins from dried leaves (e.g., Indian Almond or Oak leaves) to mimic their natural peat swamp environment. Diet: Strictly carnivorous; they prefer small live foods like white worms, daphnia, or frozen bloodworms. Breeding Behavior Nest Building: Unlike some other wild bettas that are mouthbrooders, B. burdigala is a bubblenester. Nesting Sites: They are "submerged bubblenesters," often preferring to build nests inside caves, PVC pipes, or under large leaves rather than on the water surface. Parental Care: The male guards the nest and tends to the eggs, which typically hatch in 36–72 hours. They are known to be sensitive parents, and any disturbance may cause the male to abandon or eat the eggs.
