Dawkinsia arulius

Family: Cyprinidae

Dawkinsia arulius — a Cyprinidae freshwater fish. Reaches 9–13.2 cm; keep at 19–25 °C.

Care parameters

Water temperature
19–25 °C
pH
6–6.5
GH hardness
5–15 dGH
Adult length
9–13.2 cm
Minimum tank
209 L
Water layer
Bottom-dwelling
Difficulty
Moderate
Temperament
Mostly peaceful; some species nip fins

Species overview

Dawkinsia arulius is a Cyprinidae. In the aquarium it stays mostly peaceful. Plan on 9–13.2 cm of adult fish at 19–25 °C. Related profiles: Dawkinsia filamentosa, Dawkinsia singhala, Dawkinsia assimilis.

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 Dawkinsia arulius easy to keep?

Intermediate difficulty. Mostly peaceful; some species nip fins; shoaling; keep in groups of 6 or more.

What temperature and water chemistry does Dawkinsia arulius need?

Aim for 19–25 °C. Room temperature to heated, depending on origin; 19–25 °C recorded range.

How big does Dawkinsia arulius get, and what tank size?

Adults reach 9–13.2 cm; it is bottom-dwelling. Plan for at least 209 litres.

What does Dawkinsia arulius eat?

Omnivore; prepared foods with regular vegetable matter. It forages naturally over fine gravel and sand, so let some food reach the bottom.

Can Dawkinsia arulius live with other fish?

Yes, with care. Mostly peaceful; some species nip fins — pair it with Similar-sized peaceful community fish — Similar size and water needs and skip Much smaller fish — May outcompete or bully tiny tankmates.

Where does Dawkinsia arulius come from?

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

Does Dawkinsia arulius jump?

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

How does Dawkinsia arulius breed?

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