Redline Dwarf Rasbora

Microrasbora rubescens

Also known as Red Line Dwarf Rasbora, Myanmar Microrasbora

Animalia›Chordata›Cypriniformes›Cyprinidae

The Redline Dwarf Rasbora is a tiny, peaceful schooling fish native to Southeast Asia, known for its striking red lateral stripe running along its body. These diminutive rasboras are perfect for nano and planted aquariums, displaying active, social behavior when kept in groups. Their small size and gentle temperament make them ideal for community tanks with other peaceful species.

Where it's from

Native to the Salween river basin

Myanmar (Burma)

At a glance

Size: 1 in; 3 cm
Min tank: 10 gal; 38 L
Group: 6+
Temp: 72–79°F; 22–26°C
pH: 6.0-7.0
GH: 36–143 ppm; 2–8 dGH
Temperament: Peaceful
Swims: Middle
Lifespan: 3-5 yrs

Ammonia 0 ppm and nitrate under 20 ppm.

Care

Diet

Feed high-quality micro pellets, crushed flakes, and small live foods such as daphnia and brine shrimp 1-2 times daily in small portions. These tiny fish have small mouths and require appropriately sized food. Supplement occasionally with blanched vegetables for balanced nutrition.

Behavior

Redline Dwarf Rasboras are highly active schooling fish that should always be kept in groups of at least 6 individuals to display natural behavior and reduce stress. They occupy the middle water column, constantly foraging and interacting with tank mates. Their small size and peaceful nature make them excellent for planted tanks where they add movement and color without disturbing plants.

Breeding

Breeding in captivity is challenging but possible in well-established, heavily planted tanks with soft, acidic water. Condition the group with quality foods and live foods, then separate a pair into a breeding tank with fine-leaved plants. Fry are extremely small and require infusoria or liquid fry food initially.

Tank mates

See all 6

Neon Tetra

Similar size and peaceful temperament; both prefer soft, acidic water

excellent

Ember Tetra

Comparable size and schooling behavior; compatible water parameters

excellent

Otocinclus

Peaceful bottom dweller; does not compete for food or space

excellent

Dwarf Gourami

Peaceful and small; may occasionally chase but generally compatible

good

Amano Shrimp

Peaceful invertebrate; helps with algae control without predating on fish

excellent

Fits a 10-gallon tank Beginner-friendly Peaceful

No state or federal restrictions on record.

Not legal advice, and possibly incomplete or out of date. Rules vary by state and change over time; check with your state wildlife or agriculture agency before buying, keeping or shipping it.

The care information here is written with AI help, so it can contain mistakes. Spot one? Tell us and we'll fix it. Native range: Tedesco et al. 2017 (CC0).