Badis ruber · Burmese Badis

Overview

The comparatively familiar badid Badis ruber has vertically arranged flank markings and a large dark tail-peduncle blotch. Its slow, retiring manner should not disguise the potential for strong territorial conflict between males.

Distribution & habitat

Its range covers much of lowland Myanmar, including the Ayeyarwady, the tributary Mu, the Sittaung, and smaller coastal systems of Mon and Tanintharyi south to the Tenasserim River. Mekong records also include Nong Khai and Chiang Rai in Thailand and Luang Prabang in Laos.

Typical settings are vegetated creeks, roadside ditches, and other still or slowly moving waters. The replacement type specimen came from a ditch among rice fields, with grasses growing above and below clear, greenish stagnant water. Another delta collection was made in an oxbow less than 30 cm deep among floating plants and grasses.

Aquarium setup

Create retreats with sand or gravel, rounded stones, roots, and branches. Floating plants, leaves, and attached Microsorum, Taxiphyllum, or Anubias add cover. Powerful light and filtration are unnecessary.

Coconut shells or clay pots with openings can serve as caves. For several males, distribute them widely and interrupt sight lines. Seasonal temperatures are part of its natural experience; heating may be unnecessary where room conditions remain suitable. A gentle rise within the established range can encourage breeding. Keep water soft rather than assuming near-neutral pH requires higher hardness.

Diet & feeding

The genus consumes small aquatic crustaceans, worms, insect larvae, and zooplankton. Dry food may be refused initially, although some fish learn to accept it. Regular small live or frozen Artemia, Daphnia, and similar prey remain important.

Check that deliberate feeders receive food. Bloodworms and Tubifex are associated with obesity and health problems and are best excluded from the routine diet.

Behaviour & compatibility

Carefully selected small, peaceful upper-water fishes can work. Avoid larger, busy, or strongly competitive feeders. Compatibility with other small bottom dwellers needs individual assessment rather than assuming that every small catfish is a proven partner.

Similar territorial bottom dwellers are unsuitable in ordinary aquariums. Keep different Badis species separate because hybridization is possible. Ornamental shrimp, particularly young ones, may be eaten.

It is not a shoaling fish. A pair or one male with several females suits restricted space. Multiple males can fight intensely and require a larger aquarium with separate territories, caves, and visual barriers.

Sexual dimorphism

Females are smaller and rounder, with much less red. Mature males have brighter colors and extended fins. Trade groups may contain disproportionately many males, so check sexes directly when assembling breeders.

Breeding

The genus uses temporary pair bonds and cave spawning, with males caring for the brood. A dedicated breeding setup improves fry survival. Provide each male a cave and condition the adults with live and frozen food.

Typical behavior includes intensified male color and rivalry, sometimes mouth-locking while a female is drawn into a cave, followed by roughly 30–100 eggs. The male excludes the female and guards and fans the brood. Generic accounts report hatching after two to three days, free swimming around six to eight days old, and another week or so spent near the cave.

Adults may then eat dispersing fry, making separation advisable. Start the initially inactive young on microworms and add Artemia nauplii once they swim in the water column.

Notes

The vertical arrangement of flank spots contrasts with horizontal rows in Badis siamensis and their absence in Badis khwae. Its larger tail-peduncle blotch extends across the upper surface, followed by three smaller spots at the caudal base. These features are more useful than the intensity of red alone.

Older publications may retain historical combinations under Badis badis, so distinguish old synonyms from similar-looking species.