The original Chili Rasbora (Boraras brigittae) was first documented in Borneo, where it inhabits slow-moving forest streams and peat swamp systems. These environments are typically soft, slightly acidic, and rich in submerged vegetation and leaf litter.

Natural habitats often contain tannins from decomposing plant matter, gentle current, and shaded overhead canopy. Boraras brigittae occupies calm midwater zones, weaving through fine vegetation while maintaining tight schooling groups.

Understanding this habitat supports aquarium design decisions, particularly regarding soft water conditions, structured planting, and subdued lighting.

Chili Rasbora thrives in aquariums that prioritize plant density, soft structure, and nano-scale proportion.

• Plants: Dense stem plants, carpeting plants, and mosses create security and enhance coloration. Floating plants help diffuse lighting and replicate shaded forest conditions.

• Hardscape: Fine driftwood branches and smaller stones maintain proportional scale in nano aquariums.

• Botanicals: Leaf litter and botanicals such as Indian Almond Leaves may be incorporated to simulate peat swamp environments and introduce mild tannins.

• Open Swim Lanes: Maintain open midwater space to allow coordinated schooling.

• Flow: Gentle flow is recommended. Avoid strong directional current.

Well-balanced aquascapes enhance red coloration, reduce stress, and encourage natural group movement.

Boraras brigittae is a micropredatory species that consumes tiny aquatic invertebrates and zooplankton in the wild.

In the aquarium, they readily accept micro pellets, finely crushed flake foods, frozen cyclops, baby brine shrimp, and other appropriately sized nano foods. Due to their extremely small mouth size, food particle size is critical.

Frequent small feedings support coloration, vitality, and breeding potential.

Chili Rasboras are peaceful and best suited for nano community aquariums with similarly small, non-aggressive species.

They pair well with other Boraras species, micro tetras, small Corydoras, and peaceful shrimp colonies. Avoid larger fish or highly competitive species that may intimidate them or outcompete them for food.

Maintaining proper group size improves confidence and visible schooling behavior.

Chili Rasboras are generally safe with adult Neocaridina and Caridina shrimp. However, due to their micropredatory nature, very small shrimplets may occasionally be consumed.

Dense planting and moss coverage improve coexistence in shrimp-focused aquariums..

Boraras brigittae is an egg-scattering species. In mature, well-planted aquariums, spawning may occur under stable conditions.

Eggs are typically deposited among fine-leaved plants or moss. Adults do not provide parental care and may consume eggs or fry if not separated.

• How big does Chili Rasbora (Boraras brigittae) get?

Chili Rasbora (Boraras brigittae) typically grows to about 0.6–0.8 inch in length, making it one of the smallest nano schooling fish available.

• Is Chili Rasbora good for a 10-gallon tank?

Yes. Boraras brigittae thrives in planted 10-gallon or larger nano aquariums when kept in a proper group.

• How many Chili Rasboras should be kept together?

A group of at least 8 Chili Rasboras is recommended to promote natural schooling behavior and reduce stress.

• Are Chili Rasboras peaceful community fish?

Yes. Boraras brigittae is a peaceful nano species suitable for calm community aquariums with similarly sized fish.

• Can Chili Rasboras live with shrimp?

Chili Rasboras are generally safe with adult Neocaridina and Caridina shrimp, though very small shrimplets may occasionally be consumed.

• What do Chili Rasboras eat?

Boraras brigittae accepts micro pellets, crushed flake, frozen cyclops, baby brine shrimp, and other appropriately sized nano foods.

• Do Chili Rasboras need soft water?

Yes. Chili Rasboras perform best in soft, slightly acidic water with stable parameters.

• Are Chili Rasboras hardy?

Boraras brigittae is moderately hardy when kept in a stable, established aquarium with consistent water conditions.

• Do Chili Rasboras breed in captivity?

Yes. Chili Rasboras are egg scatterers and may spawn in mature planted aquariums under stable conditions.

• How long does Boraras brigittae live?

With proper care and stable water parameters, Chili Rasboras can live several years in freshwater aquariums..