Betta pinguis

Overview

Betta pinguis is a stocky paternal mouthbrooder with dense dark markings below the stripe behind the eye. Quiet, well-sheltered soft-water accommodation allows its interactions and parental roles to be observed without unnecessary pressure.

Distribution & habitat

Known records are confined to the middle and upper Kapuas watershed in West Kalimantan, Indonesian Borneo. Type specimens came from a small, lightly tannin-stained stream in degraded forest. Fish usually shelter among marginal vegetation or leaves.

Aquarium setup

Allow at least an 80 × 30 cm footprint for a pair or small group. Wood, branches, pots, and short tubes create dark retreats. Leaves add cover and microbial growth, while a bare base can simplify cleaning.

Use low light, suitable plants, floating cover, and gentle mature sponge filtration. Very soft acidic water with little carbonate hardness may require a reliable soft-water supply. Secure the lid against jumping, retaining humid air and breathing access above the surface.

Diet & feeding

Insects and other small invertebrates are considered probable natural foods. Captive fish usually learn to accept dry products, supplemented regularly with water fleas, Artemia, bloodworms, and similar live or frozen items. Feed small insects beforehand and avoid excessive portions.

Behaviour & compatibility

Pairs and groups are possible, preferably in dedicated housing or with exceptionally gentle companions sharing its requirements. Large, energetic, or competitive feeders can intimidate it, making a standard community unsuitable as a default.

Sexual dimorphism

Males generally grow larger and broader-headed, with longer fins and stronger iridescence in the pelvic and anal fins.

Breeding

Females initiate much of courtship and defend the spawning area. Repeated embraces produce batches of eggs, which she collects and passes to the male. Oral incubation lasts approximately 14–21 days.

Experiences with adults eating their young vary. The female and other fish can be removed carefully a few days after spawning, without disturbing the male into swallowing the eggs or releasing them prematurely. He may also be removed once fry swim and forage independently.

Keep nursery air warm and humid. Young can start on microworms and Artemia nauplii. Offer varied small meals two or three times daily without overreliance on the latter, and use regular modest water changes.

Notes

The stocky profile and dense gill-cover markings assist identification. Similar relatives still require reliable provenance and a combination of characters.