Panaque armbrusteri L-027b

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The Gold Line, sold under the name Panaque armbrusteri L-027b, is a large South American loricariid valued for its golden lines and discreet behavior. Associated with the Rio Araguaia basin in Brazil, this fish lives mainly near the bottom, using submerged wood and rocks as shelter and grazing surfaces. Its adult size and need for wood make it suitable only for spacious, well-filtered aquariums. This form remains rare in the hobby. The specimens offered here are collected from the wild and are exclusive to Ton.Fish in Canada.

General species description

Panaque armbrusteri L-027b is a large armored catfish of the genus Panaque, recognized by its sucker mouth and teeth adapted for scraping wood. The L-027b form, known as Gold Line, has a gray-brown to dark brown base crossed by golden-yellow lines. Like several large Panaque, it is most active at dusk and during the night. Its temperament is generally peaceful toward similarly sized fish, but its considerable size and waste production require efficient filtration. Several hiding places and good water movement should be provided, along with consistent water changes.

Geographical origin and biotope

This form is associated with the Rio Araguaia in central-eastern Brazil. Its habitat includes river sections with alternating rocks, submerged wood, cut banks and moderate to strong current. Riparian vegetation consists of trees and bank plants that locally shade the water and contribute organic matter. In an aquarium, a layout with large roots, stable stones and shaded areas better reflects its natural conditions than a heavily planted tank. Warm, well-oxygenated water with low waste levels is essential for this large species.

Precise location and local name

The collection name used for this form is L-027b, while its common aquarium name is Gold Line. It is associated with the Rio Araguaia basin in Brazil. L-numbers identify loricariids traded before a complete scientific identification is available; they are especially useful for distinguishing geographic and commercial patterns. The name Gold Line directly refers to the golden lines visible on the body. In the specialty trade, this name is more descriptive than the L-027b code alone.

Appearance and physical characteristics

The body of Panaque armbrusteri L-027b is robust, ventrally flattened and protected by bony plates. Its ventral sucker mouth allows it to hold onto wood and rocks. The coloration is dominated by a dark background marked with clear golden-yellow lines extending across the body and fins. The fins are broad, and the stiff fin rays can become well developed in adults. This massive body shape, combined with a size of approximately 40 cm, requires a long, well-furnished aquarium. Dim lighting also encourages natural behavior and helps bring out its pattern.

General diet

Panaque armbrusteri L-027b is primarily herbivorous and xylophagous, but its diet should not be limited to wood alone. Provide natural roots or properly prepared wood at all times, supplemented with spirulina-based wafers, herbivore tablets and blanched vegetables such as zucchini. Small regular feedings are preferable to excessive portions. A varied diet supports growth and overall condition. Very protein-rich foods should remain occasional because they do not match this species’ specialized diet. Feeding often takes place mainly after the aquarium lights go out.

Essential data

• Name of origin river: Rio Araguaia
• Local name used: Gold Line; L-027b
• Origin of the scientific name: Panaque armbrusteri
• Full-name etymology: Panaque is a South American vernacular name used in loricariid nomenclature; armbrusteri honors ichthyologist Jonathan W. Armbruster; L-027b is an aquarium trade code for a lineage or geographic form.
• Common/vernacular names: Gold Line; Panaque L-027b
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: pah-nah-kay - arm-BRUSS-ter-eye
• Discovery: Form circulated in the aquarium trade under the L-027b code.
• Maximum adult size: Approximately 40 cm
• Water temperature and pH: 25 to 30 °C; pH 6.0 to 7.5
• Watercourse appearance and surrounding vegetation: Warm river with rocks, submerged wood, variable current and riparian vegetation.
• Typical tankmates: Geophagus altifrons, Laetecara araguaiae, Cichla piquiti, Tocantinsia piresi, Retroculus lapidifer
• Temperament and behavior: Peaceful and discreet, mainly crepuscular and nocturnal; may defend a hiding place.
• Water depth: Shallow to medium-depth areas near the bottom.
• Sexual dimorphism: Adult males may have a broader head and more developed odontodes; identification can be difficult.
• Bottom structure and flow: Rocky and woody bottom with moderate to strong current and highly oxygenated water.

In your aquarium

To successfully keep Panaque armbrusteri L-027b, provide a large mature aquarium, oversized filtration and excellent oxygenation. Wood should always be available, along with shelters large enough for an adult. Keep the water warm and stable, remove uneaten vegetables and monitor the organic load. Because this is a wild-caught fish, careful acclimation and quarantine are especially advisable. Its availability is rare and exclusive to Ton.Fish in Canada, so the aquarium should be planned before the specimen arrives.