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FishFreshwaterIntermediate

Curated catalog

Wine red betta

Betta tussyae

A rare wild betta belonging to the B. coccina complex, with a deep wine-red livery and iridescent green-blue spots. Native to the peat bogs and blackwater streams of eastern Peninsular Malaysia, it is among the smallest bettas (3–3.7 cm) and the most demanding in terms of water: pH 3.0–6.0, near-zero hardness. In dark tanks with tea-colored water and leaf litter, its colors emerge with surprising depth. Short-lived (2–3 years) but accessible breeding. Watch for obesity — do not overfeed. Exclusively for species-only tanks.

Family
Osphronemidae
Origin
Malaysia
Tank use
Used in 0 tanks
Temperature

21 °C - 26 °C

pH

5 - 6

Water type

Freshwater

Tank level

Zona intermedia e superiore

Adult size

3.7 cm

Description

Geographical Origin & Biotope:

Endemic exclusively to an incredibly restricted, highly vulnerable geographical location: the dense, pristine coastal peat swamp forests of the Pahang state in Peninsular Malaysia. Betta tussyae is an exceptionally rare, highly specialized wild labyrinth fish. It natively colonizes extremely shallow, deeply shaded, and completely stagnant peat pools and microscopic forest streams. These extreme blackwater biotopes are characterized by massive accumulations of decomposing leaves and submerged roots, rendering the water the color of dark coffee.

Taxonomy & Morphology:

Scientifically classified within the Osphronemidae family, it belongs to the highly specialized *Betta coccina* complex (a group of tiny, heavily red-pigmented wild Bettas). Morphologically, it is a spectacular, delicate "micro-Betta," with fully mature adults rarely exceeding 3.5 to 4.5 centimeters (1.4-1.8 inches) in total length. It possesses an incredibly slender, perfectly streamlined torpedo-like body designed to navigate through dense tangles of sunken leaf litter. Like all Bettas, it utilizes a highly evolved labyrinth organ to gulp atmospheric air.

Social Behavior:

They are deeply shy, exceptionally peaceful, and highly secretive micro-labyrinth fish. Unlike the large, aggressive *Betta splendens*, B. tussyae is incredibly timid. While males will establish tiny territories in the leaf litter and engage in brief, flared-gill lateral displays to assert dominance over rival males, these interactions are almost entirely bluffing and rarely result in physical injury. They spend the vast majority of their lives hovering motionless under the deep cover of dark leaves, venturing out only to ambush microscopic prey.

Coloration & Sexual Dimorphism:

Sexual dimorphism is distinct and deeply beautiful, heavily reliant on pristine blackwater to manifest. Mature, dominant males exhibit a breathtaking, intensely saturated deep crimson or blood-red coloration that washes entirely over their slender bodies and fins, punctuated by subtle, glowing iridescent neon-blue streaks on the anal and pelvic fins. In stark contrast, females and sub-dominant males are vastly duller, displaying a pale, mottled greyish-brown body with distinct horizontal stress stripes and lacking the intense red pigmentation.

Care and observations

Tank Setup:

The aquarium architecture MUST flawlessly replicate an intensely dark, deeply shaded Malaysian peat swamp. A minimum 40-liter (10-gallon) tank is suitable for a small group or bonded pair. The absolute most critical requirement is a massive, thick carpet of dried Catappa (Indian Almond) leaves covering the entire substrate, creating a complex network of dark hiding spaces. The tank MUST be dimly lit, densely packed with fine aquatic moss, and completely covered by floating plants. A 100% secure, tight-fitting lid is mandatory to maintain humid air.

Diet & Feeding:

They are highly specialized, deliberate micro-predators (carnivores) with microscopic mouths. In the wild, they exclusively hunt tiny insects and zooplankton. In the aquarium, they are notoriously finicky and will utterly reject standard commercial flakes or large pellets. You MUST target-feed them a varied, high-quality micro-diet. Daily offerings of live or high-quality frozen micro-foods are strictly mandatory: Daphnia, microworms, Grindal worms, newly hatched Artemia (baby brine shrimp), and tiny bloodworms.

Water Quality:

Originating from the extreme peat swamps of Malaysia, they strictly demand highly stable, pristine, intensely soft, blackwater conditions. They thrive in warm tropical temperatures (24-28°C / 75-82°F). Crucially, they require virtually zero hardness (GH 1-4) and an intensely acidic pH (4.0 - 6.0). They possess zero tolerance for dissolved organic waste; rigorous weekly water changes using RO (Reverse Osmosis) water reconstituted with botanicals are absolutely mandatory. The water flow MUST be completely stagnant; they despise strong currents.

Compatibility & Tankmates:

Compatibility is strictly limited by their microscopic size, extreme shyness, and requirement for extreme blackwater conditions. They are best kept in a dedicated, single-species nano biotope aquarium (a "species tank") to observe their natural behaviors. If housed in a community, tankmates MUST be exceptionally peaceful, tiny, and non-aggressive micro-fish that share their need for highly acidic water. Excellent companions include Boraras (Chili Rasboras) or tiny Kuhli Loaches. They MUST NEVER be housed with fast, boisterous, or aggressive fish.

Aquarium Breeding:

Breeding is challenging and requires a dedicated, specialized blackwater setup. Unlike many other Bettas that build floating nests, B. tussyae is a highly secretive bubblenest builder. The male builds a tiny, hidden nest of bubbles underneath a submerged, broad Catappa leaf resting on the substrate, or inside a sunken PVC pipe/cave. After the nuptial embrace, the male catches the eggs, spits them into the submerged nest, and violently guards the cave. The fry hatch in 48-72 hours and are impossibly tiny, requiring microscopic infusoria as their first food.

Risks & Diseases:

The absolute greatest physical risk is severe stress and physiological collapse (loss of color, clamped fins, death) caused by improper water chemistry (hard, alkaline tap water) or bright, unshaded aquarium lighting; dim, highly acidic blackwater is strictly mandatory. The second major risk is starvation caused by keeping them with fast, boisterous tankmates that easily steal their tiny food. Finally, they are highly susceptible to jumping and labyrinth organ damage; an uncovered tank will allow cold, dry room air to permanently damage their lungs.

Fish profile

Temperament
Generalmente pacifico e timido; maschi moderatamente territoriali e combattivi in spazi ridotti
Diet
Carnivoro: dafnia, artemia, chironomus vivi o surgelati. Accetta pellet di qualità con cautela. Non sovralimentare: soggetto a obesità
Tank level
Zona intermedia e superiore
Minimum group
2
Adult size
3.7 cm
Minimum tank
30 L
GH
n/a
KH
n/a
TDS
n/a
Conductivity
n/a
Feeding frequency
1–2 volte al giorno in micro-dosi, attenzione alla sovralimentazione
Bioload
Negligible
Flow
Corrente assente
Jump risk
Covered tank required
Reproduction
Costruttore di nido di bolle compatto, spesso tra piante galleggianti o in tubi/cavità. Il maschio custodisce il nido. Più tollerante della femmina durante l'incubazione rispetto ad altre specie. Avannotti alimentabili con infusori, poi nauplii di artemia. Non disturbare l'aria superficiale: essenziale per lo sviluppo dell'organo labirintico.
Compatibility
Esclusivamente vasca monospecifica per le esigenze idriche estreme. Se con altri, solo micro-pesci di acque acide (Boraras). Evitare qualsiasi pesce aggressivo, veloce o di taglia superiore.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Exact licensed live observation photo selected from iNaturalist for Betta tussyae.

Wine red betta — Betta tussyae | Aquarium