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Scientific Name Ancistrus triradiatus  Eigenmann, 1918
Common Name(s) Bristlenose Catfish
Type Locality Quebrada Cramalote, Barrigona Villavicencio, Colombia.
Pronunciation an SISS truss – try RAID ee ah tuss
Etymology The name Ancistrus is derived from the Greek word agkistron, meaning hook, in reference to the interopercular odontodes that are hooked. This specific epithet refers to the three (tri=three) rays (radiatus=rays) or divisions of tentacles on its snout.
Jump to next section Species Information
Size 120mm (4.7″) SL. Find near, nearer or same sized spp.
Identification Mature males and sometimes females have soft tentacles (bushy fleshy growths) on the snout – this is unique to the genus Ancistrus.

A. triradiatus is an overall mottled brown that can range from golden to dark brown. The caudal and paired fins sport a pattern of darker markings that often merge to form wavy lines.

Sexing Typical for the genus with males possessing the so-called ”bushy nose”. Females also may have much smaller growths on the head but to a much lesser extent.
Jump to next section Habitat Information
Distribution Exported in large numbers via Villavicencio, Colombia for the aquarium hobby. Most likely occurs throughout the upper Rio Meta and in the lower reaches of Andean streams that feed the Rio Meta. Records from the Rio Magdalena and Maracaibo basin drainages are suspect.
Orinoco, Middle Orinoco, Meta (click on these areas to find other species found there)

Show it on a map (Click the map-icon to show/hide map of species distribution)

pH 6.6 – 7.6
Temperature 24.0-30.0°C or 75.2-86°F

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