Edit Rasbora caudimaculata

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Name

Scientific name

Rasbora caudimaculata

Described by

Not recorded

Family

Cyprinidae

Common names

Greater Scissortail Rasbora

Photograph credits

All 4 credited

Summary

The greater scissortail rasbora, Rasbora caudimaculata, is a cyprinid probably restricted to Peninsular Malaysia, Borneo and Sumatra. Also …

Size and aquarium

Maximum size

150mm, standard length

Aquarium size

Minimum length 150 cm, Minimum depth 45 cm, Minimum height 45 cm

Water

Water conditions

20–26°C

Hardness

2–10dGH

Conductivity

Not recorded

Behaviour

Temperament

Peaceful

Community suitability

Not recorded

Where it lives

Countries, regions, rivers and lakes

Cambodia, Indonesia, Malaysia, Thailand

Writing

Etymology

Not written yet

Distribution

This species has a confusing natural range if the available records are studied. Apparent occurences from Southern Thailand and the Lower Mekong basin in Cambo…

Habitat

Clearly an adaptable species as it has been collected from both swiftly-flowing forest streams with substrates of boulders, smaller stones, sand or gravel and …

Aquarium size

A tank measuring 150 ∗ 45 ∗ 45 cm/~304 litres should be the minimum considered to house a group. It will not do well without space to swim and can act nervousl…

Maintenance

Choice of decor is not as critical as water quality and the amount of open swimming-space provided. We suggest keeping it in a large, well-planted aquarium or …

Water conditions

Temperature: 20 – 26 °C pH: 5.0 - 7.5 Hardness: 2 - 10°H

Diet

According to stomach analyses of wild specimens this species feeds mainly on invertebrates both aquatic and terrestrial, particularly insects. In the aquarium …

Behaviour and compatibility

This species is very peaceful indeed making it an ideal resident of the larger, well-furnished community set-up. It can upset slow-moving/much shyer companions…

Sexual dimorphism

Adult males tend to be noticeably slimmer than females and show faint yellow colouration in the anal fin.

Reproduction

We're not sure if it has been bred in the hobby although it should certainly be possible. Like most cyprinids this species is an egg-scattering, continuous spa…

We're not sure if it has been bred in the hobby although it should certainly be possible. Like most cyprinids this species is an egg-scattering, continuous spawner that exhibits no parental care. That is to say when the fish are in good condition they will spawn often and in a densely-planted, mature aquarium it is possible that small numbers of fry may start to appear without human intervention.

However if you want to increase the yield of fry a slightly more controlled approach is required and we suggest upscaling an approach that has proven successful for smaller members of the genus. The adult group can still be conditioned together but one or more long, shallow, say 48" x 12" x 12"/120cm x 30cm x 30cm/113 litre containers should also be set up and half-filled with water. These should be very dimly lit and the base covered with some kind of mesh of a large enough grade so that the eggs can fall through it but small enough so that the adults cannot reach them. The widely available plastic 'grass'-type matting can also be used and works very well for other species. The water itself should be of slightly acidic to neutral pH with a temperature towards the upper end of the range suggested above. An internal power filter can be added initially and this should be positioned so that the flow is directed down the full length of the tank.

When the adult fish are well-conditioned and the females appear full of eggs one or two pairs should then be introduced to each container. Spawning can be initiated by adding small amounts of cool water every few hours in such a way that the tank is gradually topped up and feeding small amounts of live and frozen foods. Several spawning events will probably occur before a female is spent of eggs.

The adults will likely eat any eggs they find and are best removed after a couple of days at which point the power filter should be switched for a mature sponge-type unit in order to avoid fry being sucked into the mechanism. Incubation in Rasbora eggs is temperature-dependant to an extent but usually takes between 18 and 48 hours with the young free-swimming 24 to 48 hours later. Initial food should be Artemia nauplii and/or microworm.

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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.

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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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Notes

This striking species may also be seen on sale with the trade name of 'red scissortail'. It can be distinguished from the similar-looking R. trilineata by the …

References

No references

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