白边搏鱼

Overview

Betta albimarginata is a small paternal mouthbrooder with broad pale fin margins surrounding dark bands and red inner areas. Quiet housing and very soft, acidic water matter more than a busy display. Broods are small, so spawning success should not be judged by the expectations associated with prolific domestic bettas.

Distribution & habitat

It appears endemic to the Sebuku drainage in East Kalimantan, Indonesian Borneo. Fish occupy very shallow margins of moderately flowing forest streams among plant roots and leaf litter.

Aquarium setup

Use wood, roots, pots, or pipes to create shaded retreats. Leaves add shelter and support microorganisms that may supplement fry diets. Dim light, tolerant plants, and floating cover suit the fish. Maintain acidic water with very low general and carbonate hardness. Gentle air-powered filtration is sufficient. Secure the cover against jumps and retain warm, humid air above the water.

Diet & feeding

Natural prey probably includes insects, small invertebrates, and zooplankton. Dry foods are often accepted once recognized, but regular small live or frozen water fleas, brine shrimp, and bloodworms should provide variety. Avoid excessive feeding.

Behaviour & compatibility

A species aquarium is preferable. Very small, quiet companions may work, whereas larger or vigorous feeders can intimidate and outcompete it. Pairs and groups are both possible with suitable shelter.

Sexual dimorphism

Mature males are more colorful and have a broader head.

Breeding

Extended courtship and practice embraces precede egg release. Eggs caught against the male's anal fin are collected by the female, then passed to him through the water. Even ten eggs represent a good brood.

Stress or inexperience can lead a brooding male to swallow or release the eggs. Leaving the female and established companions undisturbed is therefore preferable to disruptive removal. After about ten to twenty-one days, free-swimming fry emerge. They may be moved for rearing or usually remain safely with adults. Microworms and brine shrimp nauplii are suitable immediately. Use small, varied meals several times a day, avoiding excessive reliance on brine shrimp. Maintain humid air under tight cover and make regular small water changes.

Notes

Compare the width and continuity of fin bands when distinguishing similar species. Body redness alone is unreliable; the dorsal and upper tail pattern offer better clues.