neon blue rasbora (Sundadanio axelrodi)

Family: Cyprinidae

neon blue rasbora — a Cyprinidae freshwater fish. Reaches 1.7–2.5 cm; keep at 23–26 °C.

Care parameters

Water temperature
23–26 °C
pH
6.5–7.5
GH hardness
5–15 dGH
Adult length
1.7–2.5 cm
Minimum tank
25 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Mostly peaceful; some species nip fins

Species overview

A Cyprinidae species: Sundadanio axelrodi lives bottom-dwelling over gravel. Mostly peaceful; some species nip fins. Adults reach 1.7–2.5 cm. It is one of the aquarium-kept Sundadanio species we profile, alongside Sundadanio goblinus.

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 neon blue 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 neon blue rasbora need?

Aim for 23–26 °C. Room temperature to heated, depending on origin; 23–26 °C recorded range.

How big does neon blue rasbora get, and what tank size?

Full size is 1.7–2.5 cm. Minimum tank: 25 L, with open swimming space along its bottom-dwelling habits.

What does neon blue rasbora eat?

Omnivore; prepared foods with regular vegetable matter. Vary the menu — quality flakes or pellets plus frozen or live foods.

Can neon blue 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 neon blue rasbora come from?

It lives in clear streams and rivers over gravel. Moderate, well-oxygenated current; Appreciates well-oxygenated water.

Does neon blue rasbora jump?

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

How does neon blue rasbora breed?

In the aquarium: egg-scatterer; no parental care. Males often slimmer and more colourful.