Panaque armbrusteri L-027c

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The Panaque armbrusteri L-027c, also known as Tocantins Royal, is a large South American loricariid valued for its robust body and contrasting pattern. Associated with the Rio São Manuel in Brazil, this Panaque is one of the most impressive wood-eating catfish kept in aquariums. Its availability remains limited, making it a very rare fish in the trade. The specimens offered by Ton.Fish in Canada are wild collected and represent an exclusive offering for Canadian aquarists. A spacious, well-oxygenated aquarium with plenty of natural wood is essential.

General species description

Panaque armbrusteri L-027c is a large armoured catfish in the family Loricariidae, recognized by its massive, flattened body covered with bony plates. The L-027c code identifies a geographical or commercial form within the Panaque armbrusteri complex; Tocantins Royal is the name commonly used in the aquarium trade. It is mainly a crepuscular and nocturnal fish that spends much of its time resting on décor or grazing surfaces. It may become territorial toward other large loricariids, especially in confined surroundings. Like other Panaque, it produces substantial waste and requires powerful filtration.

Geographic origin and biotope

This form originates in Brazil, from the system associated with the Rio São Manuel, also known as the Teles Pires. Its habitat consists of large tropical waterways with generally warm, well-oxygenated water and moderate to strong current. The bottom includes rocks, sand and submerged wood, which provide shelter and feeding surfaces. Riparian vegetation contributes shade and organic matter, while branches and trunks create additional hiding places. An aquarium that reproduces this structure, with good water movement, is more suitable than an open setup with few shelters.

Precise locality and local name

The reference locality supplied for this population is the Rio São Manuel in Brazil, within the Tapajós system. In the aquarium hobby, it is mainly identified by the code L-027c and the name Tocantins Royal. L-numbers are used to distinguish forms of loricariids whose identity or commercial distribution was not always clearly established when they first entered the hobby. The name Tocantins Royal emphasizes its impressive appearance and commercial association with the Tocantins region, although the Rio São Manuel belongs to the Tapajós basin.

Appearance and physical characteristics

The body of Panaque armbrusteri L-027c is stocky, heavily armoured and equipped with a broad head and ventral sucker mouth. Its coloration ranges from dark brown to black, crossed by irregular pale lines or bands that may vary with age, mood and geographic origin. The fins are broad and spined, helping the fish hold its position on solid surfaces. Its spoon-shaped teeth are adapted for rasping wood and plant material. At adult size, its body mass and waste production become significant, so a large display aquarium is necessary.

General diet

Panaque armbrusteri L-027c has a primarily herbivorous and detritivorous diet, with a genuine need for natural wood in its environment. Roots and branches of suitable soft wood should remain available to support grazing behaviour and fibre intake. Supplement the diet with spirulina-based wafers, herbivore tablets and vegetables such as zucchini or cucumber. Feeding is best done after the lights go out, when the species becomes active. A diet that is excessively rich in animal protein may lead to obesity and does not match its primary nutritional needs.

Essential data

• Name of original river: Rio São Manuel
• Local name used: Tocantins Royal; L-027c
• Origin of the scientific name: Panaque is the genus name; armbrusteri honours Jonathan W. Armbruster.
• Meaning of the full name: Panaque identifies the loricariid genus; armbrusteri means dedicated to Armbruster.
• Common/vernacular names: Tocantins Royal
• Family: Loricariidae
• Subfamily: Hypostominae
• Pronunciation: pan-ah-kay arm-BROOS-ter-eye - L zero two seven see
• Discovery: described by Nathan K. Lujan, Max Hidalgo and Donald J. Stewart in 2010.
• Maximum adult size: approximately 40 cm
• Water temperature and pH: 25 to 30 °C; approximately pH 6.0 to 7.5
• Waterway appearance and surrounding vegetation: large warm, oxygen-rich river with rocks, submerged wood and riparian vegetation.
• Typical tankmates: large characins, peaceful South American cichlids and other midwater fish suited to similar parameters.
• Temperament and behaviour: generally peaceful and mainly nocturnal; territorial toward some conspecifics and other large loricariids.
• Water depth: main-channel areas and sections associated with rocky or wooded substrates.
• Sexual dimorphism: mature males often develop a broader head and more pronounced cheek and body odontodes.
• Bottom structure and flow: rocky, sandy and woody bottom; moderate to strong current with good oxygenation.

In your aquarium

To keep Panaque armbrusteri L-027c successfully, use a very large aquarium with oversized filtration, well-distributed current and numerous wooden hiding places. Natural wood must be permanently available, and regular water changes are essential because of the fish’s size and heavy waste production. This very rare wild-collected fish deserves careful acclimation, a fibre-rich diet and close monitoring of water quality. Ton.Fish offers it exclusively in Canada, giving aquarists access to a sought-after geographical form while providing conditions that reflect its natural requirements.