Edit Trigonopoma gracile

You can suggest changes to this profile. A moderator will review each change.

Name

Scientific name

Trigonopoma gracile

Described by

Authority Kottelat, Year 1991, Bracketed

Family

Cyprinidae

Common names

Not recorded

Photograph credits

All 4 credited

Summary

Trigonopoma gracile is a small rasbora from the blackwater peat swamps of Peninsular Malaysia, Borneo and Sumatra. Its colour forms vary wi…

Size and aquarium

Maximum size

55mm, standard length

Aquarium size

Minimum length 75 cm, Minimum depth 30 cm

Water

Water conditions

Temperature 21–26°C, pH 4–7

Hardness

0–10dGH

Conductivity

Not recorded

Behaviour

Temperament

Not recorded

Community suitability

Community-safe

Where it lives

Countries, regions, rivers and lakes

Indonesia, Malaysia, Borneo, Borneo, Peninsular Malaysia, Riau Islands, Sumatra

Writing

Etymology

Not written yet

Distribution

Type locality is 'Sungei Pinyuh, 8 kilometers southeast of Anjungan on road to Pontianak, 0°20'N, 109°08'E, Kalimantan Barat, Borneo', but this species is wide…

Habitat

Primarily inhabits black water streams and rivers associated with ancient forest peat swamps in which the water that is typically stained dark brown by humic a…

Aquarium size

Minimum base dimensions of 75 ∗ 30 cm or equivalent are required for long-term care.

Maintenance

Choice of décor is not especially critical though it tends to show better colouration in a heavily-planted set-up with a dark substrate. A more natural-looking…

Water conditions

Not written yet

Diet

Likely to be a micropredator feeding on small insects, worms, crustaceans, and other zooplankton in nature. In the aquarium it's easily-fed but the best condit…

Behaviour and compatibility

An ideal addition to a peaceful community of Southeast Asian fishes with comparably-sized cyprinids, small loaches, and certain anabantoids perhaps constitutin…

Sexual dimorphism

Mature females are noticeably rounder-bellied and often a little larger than the slimmer, more-intensely patterned males.

Reproduction

Possibly unrecorded but recommendations for related species are as follows: Like most small cyprinids Trigonopoma spp. are egg-scattering free spawners exhibit…

Possibly unrecorded but recommendations for related species are as follows:

Like most small cyprinids Trigonopoma spp. are egg-scattering free spawners exhibiting no parental care. When in good condition they will spawn often and in a mature aquarium it's possible that small numbers of fry may start to appear without intervention.

However if you want to maximise yield a more controlled approach is required. The adult group can still be conditioned together but a smaller aquarium should also be set up and filled with mature water.

This 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 but small enough so that the adults cannot reach them.

The widely available plastic 'grass'-type matting can also be used and works well, as does a layer of glass marbles. Alternatively filling much of the tank with a fine-leaved plant such as Taxiphyllum spp. or spawning mops can also return decent results. The water itself should be of slightly acidic pH with a temperature towards the upper end of the range suggested above. An air-powered sponge filter or air stone(s) should also be included to provide oxygenation and water movement.

When the adults are well-conditioned and the females appear gravid one or two pairs should then be introduced, and spawning should take place the following morning.

An alternative is to spawn the fish in a group with half a dozen specimens of each sex being a good number, although a larger aquarium may be necessary.

In either situation the adults will probably eat the eggs given the chance and should be removed as soon as any are noticed. These should hatch in 18-48 hours with the fry free swimming after 3-4 days.

They should be fed on an infusoria-grade food for the first few days until large enough to accept microworm, Artemia nauplii and suchlike.

Editing needs JavaScript. This is the text as it was last saved.

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

Paste the address of the page that says this. What counts as a source

DOI

Paste a DOI and we will look up the rest of the reference. A DOI looks like 10.11646/zootaxa.4694.4.1, and most papers print it on the first page.

Title

Enter the title of the paper, book or page. If you leave it empty, we will use the website's address.

Authors

Separate authors with semicolons, e.g. Tan, H.H.; Ng, P.K.L.

Year

Journal or publisher

Pages

Enter the page that says this, e.g. 218 or 218–221.

Anything worth adding

Describe what you saw, or which part of the source says this.

Notes

This species occurs in several colour forms depending on collection locality with some exhibiting more intense pigmentation in the fins or an additional reddis…

References

5 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