
Source: Wikimedia Commons
Boraras merah
A tiny cyprinid about 2cm long, reddish with a row of round black blotches, from the peat swamp forests of western and southern Borneo. It needs strongly acidic, soft water and is timid enough to suit a species tank.
Boraras merah is a tiny cyprinid of the peat swamp forests of western and southern Borneo. FishBase records a maximum of 2.0cm SL. Seriously Fish gives 20-28C, pH 4.0-6.5, 1-5 dGH and a 45 x 30cm base, assuming strongly acidic, soft water throughout. The specific name merah is Malay and Indonesian for red, and the fish is indeed reddish with a row of round black blotches along the flank. Extremely peaceful but small and timid, it is unsuited to a general community. Other Boraras, along with Microdevario, Sundadanio, Danionella, Trigonostigma, pygmy Corydoras and Otocinclus, make good companions. It is a continuous spawner with no parental care, laying a few eggs each day when in condition. Too little is known of its status for assessment, so the IUCN lists it as Data Deficient. It is not covered by CITES.
Source: Wikipedia (CC BY-SA 4.0)
The Phoenix Rasbora lives 2-4 years.
The Phoenix Rasbora grows to Up to 2cm SL.
The ideal temperature for the Phoenix Rasbora is 20〜28℃.
Origin
Indonesia (western and southern Borneo)
Lifespan
2-4 years
Size
Sources: FishBase / Seriously Fish
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Boraras merah (Kottelat, 1991)
Synonyms: Rasbora merah
Authority databases: FishBase
Nomenclature follows global taxonomic authority databases.
Sources: CITES Appendices (species not listed) / IUCN Red List
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
Up to 2cm SL
Temperature
20〜28℃
Fine dried foods and live or frozen Artemia nauplii and daphnia
Seriously Fish suggests a 45 x 30cm base. A densely planted tank with driftwood, leaf litter and floating plants to diffuse the light suits it, and filter flow should be gentle, as it comes from sluggish water.
Seriously Fish gives 20-28C, pH 4.0-6.5 and 1-5 dGH. It lives in peat swamp blackwater, so strongly acidic, soft water is a precondition and it fares badly in hard water.
Peaceful but small and timid, so not a general community fish. Other Boraras, plus Microdevario, Sundadanio, Danionella, Trigonostigma, pygmy Corydoras and Otocinclus, are good choices.
Its mouth is very small, so use the finest dried foods. Live or frozen Artemia nauplii and daphnia improve colour and breeding condition. Feed small amounts several times a day.
An egg-scattering continuous spawner with no parental care. Given fish in good condition, a few eggs are laid every day. In a mature, densely planted tank some fry survive unaided, but separating eggs or adults raises the yield.
It reacts badly to sudden changes, so acclimatise it slowly. Groups of eight to ten or more settle it and bring out colour. Too little is known of its status, so the IUCN lists it as Data Deficient. It is not covered by CITES.
Intermediate. This is an intermediate-level species. Some prior experience and knowledge of environmental management are recommended.
The ideal temperature for Phoenix Rasbora is 20〜28℃. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Phoenix Rasbora is 2-4 years. With proper care and nutrition, they can live a long and healthy life.
Phoenix Rasbora typically reaches Up to 2cm SL as an adult. Size may vary depending on care conditions and individual genetics.
Phoenix Rasbora feeds on: Fine dried foods and live or frozen Artemia nauplii and daphnia. Aim for a balanced diet with appropriate feeding frequency.
The price of Phoenix Rasbora varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: September 17, 2026