Edit Danio roseus

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Name

Scientific name

Danio roseus

Described by

Authority Fang & Kottelat, Year 2000

Family

Cyprinidae

Common names

Rosy Danio

Photograph credits

All 6 credited

Summary

The rosy danio, Danio roseus, is a small cyprinid from the Mekong basin in northern Thailand and Laos, also recorded in northern Myanmar. C…

Size and aquarium

Maximum size

55mm, standard length

Aquarium size

Minimum length 90 cm, Minimum depth 30 cm

Water

Water conditions

Temperature 18–25°C, pH 6–7.5

Hardness

2–15dGH

Conductivity

Not recorded

Behaviour

Temperament

Peaceful

Community suitability

Community-safe

Where it lives

Countries, regions, rivers and lakes

Laos, Myanmar, Thailand, Mekong

Writing

Etymology

Danio: from Dhani, a Bengalese vernacular term for small, minnow-like cyprinids. roseus: from the Latin roseus, meaning 'rosy, pink', in reference to the colou…

Distribution

Described from the Mekong River basin in Nong Khai and Chiang Rai Provinces, northern Thailand, and Louangphabang Province, northern Laos but now known to occu…

Habitat

Most commonly found in small, well-oxygenated, running streams under forest cover but has also been collected from backwaters of larger rivers, and there exist…

Aquarium size

Base dimensions of 90 ∗ 30 cm or equivalent should be the smallest considered.

Maintenance

Looks particularly effective in a heavily-planted arrangement with a darker substrate, and may appear paler in sparsely-decorated set-ups. We suggest maintaini…

Water conditions

Not written yet

Diet

Almost certain to prey chiefly on insects and their larvae in nature. In the aquarium it's largely an unfussy feeder and will accept most foods. A good quality…

Behaviour and compatibility

This species is very peaceful indeed making it an ideal resident of the well-furnished community tank. Since it places no special demands in terms of water che…

This species is very peaceful indeed making it an ideal resident of the well-furnished community tank.

Since it places no special demands in terms of water chemistry it can be combined with many of the most popular fish in the hobby including other small cyprinids as well as tetras, livebearers, rainbowfish, anabantoids, catfish and loaches.

A community based around species from one of its native countries or river basins would also make an interesting project with numerous sympatric species available in the trade.

It's a schooling species by nature and should be kept in a group of at least 8-10 specimens.

Maintaining it in decent numbers will not only make the fish less nervous but result in a more effective, natural-looking display while males will also exhibit their best colours as they compete with one other for female attention.

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Where does this come from?

My own experienceFor example, I've kept twelve in a planted 60 cm tank since March 2024.A website I sawFor example, an IUCN Red List assessment, a museum catalogue or a FishBase page.A paperFor example, Marshall et al. (2011), Water temperature differences in interfluvial palm swamp habitats of Paracheirodon axelrodi and P. simulans.A book, or something not onlineFor example, Tappin (2010), Rainbowfishes: their care and keeping in captivity.Something already on the pageFor example, the Behaviour and compatibility section already says this.

Web address

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DOI

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Title

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Authors

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Year

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Pages

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Anything worth adding

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Sexual dimorphism

Females tend to grow larger than males and are generally deeper-bodied, more so when gravid.

Reproduction

Like many small cyprinids this species is an egg-scattering spawner that exhibits no parental care. That is to say when the fish are in good condition they wil…

Notes

D. roseus is a relatively recent addition to the aquarium trade but has proved very popular since it's colourful, hardy and usually quite cheap making it ideal…

References

7 on this profile

Name

Scientific name

Described by

Family

Common names

Photograph credits

Summary

Size and aquarium

Maximum size

Aquarium size

Water

Water conditions

Hardness

Conductivity

Behaviour

Temperament

Social needs

Community suitability

Where it lives

Countries, regions, rivers and lakes

Writing

Etymology

Distribution

Habitat

Aquarium size

Maintenance

Water conditions

Diet

Behaviour and compatibility

Sexual dimorphism

Reproduction

Notes

References

References