Emeral Dwarf Rasbora (Microrasbora rubescens)

Family: Cyprinidae

Emeral Dwarf Rasbora — a Cyprinidae freshwater fish. Reaches 2.2–3.3 cm; keep at 21–25 °C.

Care parameters

Water temperature
21–25 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
2.2–3.3 cm
Minimum tank
25 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Mostly peaceful; some species nip fins

Species overview

Microrasbora rubescens is a Cyprinidae. In the aquarium it stays mostly peaceful. Plan on 2.2–3.3 cm of adult fish at 21–25 °C. In a community tank it pairs well with Similar-sized peaceful community fish.

Native biotope

Habitat
Clear streams and rivers over gravel
Flow
Moderate, well-oxygenated current
Dissolved O₂
Appreciates well-oxygenated water

Aquascape & hardware

Substrate
Fine gravel and sand
Hardscape
Water-worn stones and driftwood
Plants
Hardy rooted plants along the margins

Temperament, diet & tankmates

Schooling
Shoaling; keep in groups of 6 or more
Diet
Omnivore; prepared foods with regular vegetable matter
Recommended tankmates
  • Similar-sized peaceful community fish — Similar size and water needs
Avoid keeping with
  • Much smaller fish — May outcompete or bully tiny tankmates

Breeding & notes

Sexual dimorphism
Males often slimmer and more colourful
Breeding method
Egg-scatterer; no parental care

Frequently asked questions

Is Emeral Dwarf Rasbora easy to keep?

Difficulty: moderate. Mostly peaceful; some species nip fins. Shoaling; keep in groups of 6 or more.

What temperature and water chemistry does Emeral Dwarf Rasbora need?

Set the heater to 21–25 °C and avoid swings. pH 6.5–7.5, GH 5–15 dGH suit it.

How big does Emeral Dwarf Rasbora get, and what tank size?

Adults reach 2.2–3.3 cm; it is bottom-dwelling. Plan for at least 25 litres.

What does Emeral Dwarf Rasbora eat?

Omnivore; prepared foods with regular vegetable matter. Feed two small meals a day rather than one large one.

Can Emeral Dwarf Rasbora live with other fish?

Mostly peaceful; some species nip fins. Recommended tankmates: Similar-sized peaceful community fish — Similar size and water needs. Avoid Much smaller fish — May outcompete or bully tiny tankmates.

Where does Emeral Dwarf Rasbora come from?

Its habitat is clear streams and rivers over gravel — moderate, well-oxygenated current, appreciates well-oxygenated water.

Does Emeral Dwarf Rasbora jump?

Jumping is not a known issue; cover the tank anyway during water changes.

How does Emeral Dwarf Rasbora breed?

Egg-scatterer; no parental care. Males often slimmer and more colourful.