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Edit Opsarius pulchellus

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Name

Scientific name

Opsarius pulchellus

Described by

Authority Smith, Year 1931, Bracketed

Family

Cyprinidae

Common names

Not recorded

Photograph credits

All 9 credited

Summary

Traded as 'butterfly barb' or 'mackerel barb', Opsarius pulchellus is a cyprinid from the Chao Phraya and mid-to-lower Mekong basins. It oc…

Size and aquarium

Maximum size

110mm, standard length

Aquarium size

Minimum length 120 cm, Minimum depth 45 cm

Water

Water conditions

Temperature 18–26°C, pH 6–7.5

Hardness

2–12dGH

Conductivity

Not recorded

Behaviour

Temperament

Not recorded

Social needs

A shoal or group

Community suitability

Not for a community

Where it lives

Countries, regions, rivers and lakes

Cambodia, China, Laos, Thailand, Vietnam, Chao Phraya, Mekong, Nam Theun, Tonlé Sap, Xe Bang Fai

Writing

Etymology

Opsarius: apparently from an Ancient Greek word meaning 'small fish'. pulchellus: a diminutive of the Latin pulchellus, meaning 'beautiful'.

Distribution

Occurs throughout the Chao Phraya river system in central and western Thailand, and the mid-to-lower Mekong basins in Thailand, Laos, Cambodia, and Vietnam wit…

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Habitat

Typically inhabits submontane headwaters and similar well-oxygenated, low-to-medium gradient, moderate to fast-flowing minor rivers and streams with substrates…

Aquarium size

Requires a large aquarium with minimum surface area of 120 ∗ 45 cm or equivalent.

Maintenance

The aquarium should ideally be designed to resemble a flowing stream or river with a substrate of variably-sized rocks, sand, fine gravel, and some larger wate…

Water conditions

Not written yet

Diet

Opsarius spp. are predominantly surface-feeders preying on aquatic and terrestrial insects in nature, with some small fishes and benthic invertebrates probably…

Behaviour and compatibility

Unsuitable for the general community due to its environmental requirements, and likely to outcompete or intimidate slow-moving and less bold species at meal ti…

Sexual dimorphism

Mature males develop extended pectoral, dorsal, and anal fins and nuptial individuals possess visible breeding tubercules on the head and body, plus bright yel…

Reproduction

Unreported.

Notes

This species is traded for aquaria under various names including 'butterfly barb', 'mackerel barb', 'green-barred danio', or 'royal opsarius'. It can be told a…

References

References

9 on this profile