How to Identify Barbour's Pencil Catfish

To identify Barbour's Pencil Catfish (Trichomycterus barbouri), look at these key features.

Physical Characteristics

Body shape

elongated

Coloration

Variable, typically mottled brown, grey, or yellowish, often with darker spots or irregular bands, providing camouflage against rocky or sandy substrates. Ventral surface usually paler.

Scale type

none

Mouth position

subterminal

Distinctive features

Lack of scales, Three pairs of barbels (nasal, maxillary, rictal), Small, often subcutaneous eyes, Elongated, cylindrical body, Small, rounded caudal fin

Dorsal fin

Small, located posteriorly, typically with 7-9 rays.

Tail fin

Small, rounded or slightly truncate, typically with 10-12 principal rays.

Pectoral fin

Small, fan-shaped, with 6-8 rays, often with a spine.

Distinctive fins

Adipose fin absent. Pelvic fins small, located abdominally.

Identification Tips

1. 1

   Body Shape

   Elongated and cylindrical, typical of 'pencil catfish' morphology.

2. 2

   Scales

   Absence of scales is a key characteristic of the family Trichomycteridae.

3. 3

   Barbels

   Presence of three pairs of barbels around the mouth (nasal, maxillary, rictal) is diagnostic.

4. 4

   Fin Placement

   Dorsal fin is small and positioned far back on the body, close to the caudal fin.

5. 5

   Eyes

   Small eyes, often partially covered by skin, indicating adaptation to low-light or cryptic environments.

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