福氏抟鱼

Overview

Although Betta foerschi is a paternal mouthbrooder, its egg-handling sequence resembles that of bubble-nesting relatives. Blue-green iridescent fins and paired opercular bars are attractive features, but similar species are often traded under the same name. Provenance matters alongside appearance.

Distribution & habitat

Known sites lie in Central Kalimantan and around Kubu in West Kalimantan, Indonesian Borneo. Shaded forest swamp streams and pools may be very shallow, with acidic, low-mineral water over leaves, branches, and roots.

Aquarium setup

Provide several retreats using wood, roots, pots, or tubing. Leaves add cover and microorganisms. Dim lighting, tolerant plants, and floating vegetation suit very soft acidic water with little carbonate hardness. Keep filtration gentle, secure the lid, and leave humid air above the surface.

Diet & feeding

Aquatic and terrestrial invertebrates are probable natural prey. Dry food may be learned, but regular small live or frozen water fleas, brine shrimp, and bloodworms should provide variety. Avoid overfeeding.

Behaviour & compatibility

A species aquarium is generally preferable. Exceptionally quiet small fishes with matching needs may be considered. Multiple pairs or harems have yielded mixed results, from mild territorial disputes to persistent bullying by dominant individuals. A single pair is easier to manage.

Sexual dimorphism

Males are more colorful with longer unpaired fins. Their opercular bars are usually clear orange-red, whereas females show more golden-yellow bars.

Breeding

After courtship and practice embraces, the female catches the eggs against her own anal fin. The male collects them directly into his mouth, unlike the female-to-male oral transfer seen in many mouthbrooders. Incubation lasts about eight to fourteen days, and males may accept food while carrying the brood.

Stress or inexperience can cause premature loss, so leaving established companions undisturbed is preferable during incubation. Adults generally do not eat released young. Faster growth alongside parents has been reported but should not be assumed. Fry immediately take microworms and brine shrimp nauplii; avoid excessive use of the latter. Maintain warm moist air and regular modest water changes.

Notes

Trade misidentifications among close relatives are common. Opercular bars alone do not settle identity. Preserve locality labels and consider overall proportions and fin characters when maintaining breeding records.