Edit Annamia cf. thuathienensis

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Name

Scientific name

Annamia cf. thuathienensis

Described by

Authority Nguyen, Year 2005

Family

Gastromyzontidae

Common names

Not recorded

Photograph credits

All 6 credited

Summary

Annamia cf. thuathienensis is a hillstream loach described from the Bô River in Thua Thien-Hue Province, central Vietnam. Its description w…

Size and aquarium

Maximum size

100mm, standard length

Aquarium size

Minimum length 120 cm, Minimum depth 30 cm, Water movement High: fast-flowing river or riffle

Water

Water conditions

Temperature 16–22°C, pH 6–7.5

Hardness

1–10dGH

Conductivity

Not recorded

Behaviour

Temperament

Peaceful

Community suitability

Not for a community

Where it lives

Countries, regions, rivers and lakes

Vietnam, Bô (Vietnam)

Writing

Etymology

Annamia: named for Annam, a former French protectorate which today comprises the central region of Vietnam. thuathienensis: named for Thua Thiên Province, Viet…

Distribution

Described from the Bô River, Thua Thien-Hue Province, central Vietnam. At present, there are no additional records.

Habitat

Largely unconfirmed, but its ecology should be similar to that of A. normani which inhabits shallow, swiftly-flowing stretches of streams and small rivers. The…

Aquarium size

Minimum base dimensions of 120 ∗ 30 cm or equivalent are required.

Maintenance

Since Annamia spp. are obligate residents of riffles and rapids in nature it is essential to maintain them in a set-up designed to resemble such a habitat. Use…

Water conditions

Not written yet

Diet

Traditionally considered to be a micropredator feeding on insect larvae and suchlike (Rainboth, 1996)[3], but a study by Herder and Freyhof (2006)[1] revealed …

Traditionally considered to be a micropredator feeding on insect larvae and suchlike (Rainboth, 1996)[3], but a study by Herder and Freyhof (2006)[1] revealed adult A. normani inhabiting the Duc My River in central Vietnam to be specialised grazers of cyanobacteria. In rapids the latter form hard encrustations on rock surfaces from which adults are able to bite chunks.

Whether this behaviour is only representative of A. normani, or even restricted to particular populations, is unclear but it would seem wise to offer dried foods containing Spirulina or similar alongside chironomid larvae (bloodworm), Tubifex, Artemia, etc., and ideally allow aufwuchs to grow on all surfaces in the tank except the viewing pane.

Gastromyzontids are often seen on sale in an emaciated state which can be difficult to correct. A good dealer will have done something about this, but if you decide to take a chance with specimens in which the body appears narrowed, especially between the pectoral and pelvic fins, they will need a constant supply of suitable foods and should be kept alone until strong enough to compete with other species.

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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

Journal or publisher

Pages

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Anything worth adding

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Behaviour and compatibility

Largely peaceful, although its environmental requirements limit the choice of suitable tankmates somewhat. Species inhabiting similar environments include Bari…

Sexual dimorphism

Sexually mature females are likely to be a little larger and fuller-bodied than males.

Reproduction

Presumably a seasonal spawner in nature but has not been bred in captivity.

Notes

This species' description was published in the Vietnamese language, and very little is known about it. Some major resources fail to list it as valid, and it is…

References

9 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