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Down arrow Cat-eLog Data Sheet
Scientific Name Tridensimilis brevis  (Eigenmann & Eigenmann, 1889)
Common Names Glass Candiru
Dwarf Parasitic Catfish, Glass Parasitic Catfish, Pygmæ-parasitmalle (Denmark)
Type Locality Tabatinga, Amazonas, Brazil.
Synonym(s) Tridens brevis
Etymology Tridensimilis: From the Latin similis, meaning equal; this genus was named after its similarity to the trichomycterid genus Tridens (from the Greek tri, meaning three and dens, meaning teeth; in reference to the number of interopercular spines). 
Article Link - CotM 2010 September
Down arrow Species Information
Size 28mm or 1.1" SL. Find near, nearer or same sized spp.
Identification Minute species of Catfish, usually actively swimming in the water column, at other times resting on plants or substrate. Tiny barbels visible on close examination (particularly when feeding). Body is remarkably transparent, the organs are enclosed in a silvery sac, although the stomach contents and other areas of the alimentary tract may be visible.
There are two dark pigment spots on the body, one in the humeral area, the other on the caudal peduncle (this spot actually appear to be made up of pigmented skeletal elements as opposed to epidermal pigment).
Sexing Unknown, although females may show ovaries through body wall when gravid.
Down arrow Habitat Information
Distribution This particular specimen originated in a shipment of Corydoras pygmaeus from Peru. The genus would appear to be widely distributed across the Amazon region, into the Maracaibo basin of Venezuela.
Amazon (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
pH 5.6 - 7.6
Temperature 21.0-30.0°C or 69.8-86°F (Show species within this range)
Other Parameters Large water changes not appreciated, very regular small changes optimal. Strong flow not required.
Down arrow Husbandry Information
Feeding Small Live Crustaceans, Worms, Insect Larvae taken eagerly. Dry food ignored. Incipient parasitism.
Furniture Not important. Sand or bare base probably best.
Compatibility Complex and variable. No problems with small characins, but there is some evidence that they are opportunistically lepidophagous on slightly larger fish under some circumstances. It has been observed that they will attack large ultra peaceful fish e.g. Doradids. There are no intraspecific compatibility problems observed, a larger group needs to be assembled to gather more information.
Breeding Currently unknown.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Proceedings of the California Academy of Sciences (Series 2) v. 2, pp 54.
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Last Update 2019 Nov 26 08:08 (species record created: 2002 Jan 07 00:00)