Betta Miniopina 3cm

Betta Miniopina 

If you're looking to keep a betta that’s truly unlike any of its popular cousins, Betta miniopinna is the one to watch. This ultra-rare, wild species is highly sought after by advanced aquarists for its elusive nature, softwater requirements, and elegant appearance. Found only in very specific peat swamp habitats in Indonesia, this little betta thrives in acidic blackwater setups and is perfect for a peaceful, biotope-style nano aquarium.

The name "miniopinna" roughly translates to small fin, and that’s exactly what sets this species apart. These bettas have incredibly short, rounded fins that hug the body closely, which helps them glide effortlessly through leaf litter and vegetation in their natural swampy homes. Their base colour is a deep maroon to reddish-brown, but when the light catches just right, males flash vivid iridescent blue-green highlights along the body and face, giving them a ghostly shimmer under subdued lighting. Females are more muted in tone but share the same streamlined beauty.

Betta miniopinna is also known for its fascinating breeding behaviour. Like other members of the coccina complex, the male is a paternal mouthbrooder, meaning he carries the eggs and fry in his mouth for about 10–14 days. This adds an extra level of intrigue for aquarists interested in wild betta breeding projects, especially when done in a heavily planted or leaf litter rich system.

Tank Recommendations for your Betta Miniopina

To replicate their natural habitat, a tank of at least 40 litres is recommended. The aquarium should be densely planted with live vegetation, including floating plants to provide cover. A gentle filtration system is ideal to maintain water quality without creating strong currents, as these betta prefer calm waters. Soft, acidic to neutral water with a pH between 5.0 and 6.0 and a temperature range of 24–28°C is essential for their well-being. Adding driftwood and leaf litter can also help mimic their natural blackwater environment and provide beneficial tannins.

Suitable Tank Buddies

Betta Miniopina can coexist with other peaceful species that share similar environmental requirements. However, due to their shy nature, it's essential to choose tank mates carefully to prevent stress. Keeping them in a species-only tank or a carefully planned community setup is ideal.

Usually Compatible

Small, non-aggressive schooling fish such as harlequin rasboras or ember tetras can make good companions. Peaceful bottom dwellers like Corydoras catfish are also a suitable choice. Other non-aggressive Betta species or individuals may coexist, provided ample space and hiding spots are available.

Sometimes Compatible

Dwarf shrimp species, such as Amano or cherry shrimp, can sometimes work, though there is a risk they may be seen as food. Small, peaceful gourami species might be compatible in larger tanks, but close monitoring is required to prevent territorial disputes.

Rarely Compatible

Large or aggressive fish that may bully or outcompete the betta should be avoided. Fin-nipping species like tiger barbs are unsuitable, as they may harass these bettas. Other territorial Betta species, especially in confined spaces, can lead to fights and should be avoided.

Feeding your Betta Miniopina

In the wild, Betta Miniopina feeds on small insects and zooplankton. In captivity, they thrive on a varied diet of high-quality live or frozen foods, including brine shrimp, daphnia, and bloodworms. They may also accept specialised Betta pellets or flakes, but live or frozen foods should constitute the majority of their diet to ensure optimal health and coloration. Feeding should be done once or twice daily, offering only what they can consume within a few minutes to prevent water quality issues.