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Panaqolus albomaculatus LDA-031, also known as Mustard Spot, is a South American loricariid valued for its dark coloration marked with mustard-yellow spots. Listed under the aquarium code LDA-031, it remains a less common fish in the trade, making it especially appealing to aquarists who appreciate naturally patterned loricariids. As a wild-collected species, it benefits from careful acclimation and highly oxygenated water. This discreet fish becomes most active after dark and appreciates shelters, submerged wood, and a mature aquarium offering a regular plant-based diet.

General species description

Panaqolus albomaculatus LDA-031 is a small armored catfish from the genus Panaqolus, adapted to living on solid surfaces in forested waterways. It spends much of the day hidden beneath roots, inside cavities, or behind pieces of wood, becoming more active as the aquarium lights dim. Its behavior is generally peaceful and reserved, although mature males may defend a shelter from other males. In captivity, it requires clean, stable, well-oxygenated water and a heavily structured layout with many hiding places. Its availability is moderate: it is less common than the most widely traded Panaqolus, but it is not considered exceptionally impossible to obtain.

Geographic origin and biotope

Panaqolus albomaculatus LDA-031 is associated with the western Amazon basin. The Río Ucayali in Peru is commonly associated with this aquarium form; Colombia is also supplied as a reference country, although that combination is geographically inconsistent. Its natural habitat consists of tropical waters where trunks, branches, and rocks provide grazing and resting surfaces. Flow may be moderate to strong in localized areas, while the water is generally warm, soft to moderately mineralized. Dense riverside vegetation surrounds these habitats, and fallen leaves and wood contribute to the structure and food web of the biotope.

Precise locality and local name

In the aquarium trade, the geographic reference most closely associated with LDA-031 is the Río Ucayali. The most commonly used vernacular name is Mustard Spot, an English name describing its yellowish spots. LDA and L codes are used to distinguish forms or populations of loricariids that may not always have an established scientific name in the trade. For this reason, it is best to retain the designation Panaqolus albomaculatus LDA-031 LDA-031 in maintenance records, stock lists, and breeding notes. This approach helps prevent confusion with other similarly patterned Panaqolus.

Appearance and physical characteristics

The body of Panaqolus albomaculatus LDA-031 is elongated, sturdy, and covered with bony plates, with a ventral mouth adapted for attaching to surfaces. The background color ranges from dark brown to nearly black, while mustard-yellow spots cover the body and fins. The fins are generally well developed, and their rays may contrast strongly with the dark body. Like other Panaqolus, its teeth are adapted for scraping wood and biofilm. Adult size remains relatively modest for a loricariid, allowing it to be maintained in a spacious community aquarium with a carefully structured layout.

General diet

Panaqolus albomaculatus LDA-031 is mainly herbivorous and detritivorous, with a strong preference for plant matter and soft wood. A piece of natural wood should always be available, as it supports both feeding behavior and digestion. Supplement its diet with spirulina-based wafers, loricariid foods, and blanched zucchini, cucumber, or green beans. A small amount of protein-rich food may be offered occasionally, particularly to juveniles or fish being conditioned for breeding, but it should not replace the plant-based foundation. Foods are best provided after the aquarium lights go out.

Essential data

• Native river: Río Ucayali
• Local name used: Mustard Spot
• Origin of the scientific name: Panaqolus identifies the genus; albomaculatus describes a coloration with pale or white spots.
• Etymology of the full name: Panaqolus is a generic name for a loricariid related to Panaque; albomaculatus means “marked with white spots.”
• Common/vernacular names: Mustard Spot, LDA-031
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: pan ah KOH luss al boh mah koo LAH tuss
• Discovery: The year and full name of the person associated with its discovery are not included in this profile.
• Maximum adult size: Approximately 12 cm
• Water temperature and pH: 24 to 29 °C; pH 6.0 to 7.5
• Waterway appearance and surrounding vegetation: Tropical forested waterway with submerged wood, roots, leaf litter, and dense riverside vegetation.
• Typical tankmates: Small Amazonian characins, peaceful dwarf cichlids, pencilfish, small peaceful loricariids, and similarly sized Corydoras.
• Temperament and behavior: Peaceful and discreet, mostly nocturnal, with limited territorial behavior around shelters.
• Water depth: Shallow to medium-depth areas near trunks, roots, and shelters.
• Sexual dimorphism: Mature males may develop a broader head and more odontodes on the cheeks and body.
• Bottom structure and flow: Sand, fine gravel, wood, and rocks; moderate to strong flow depending on the location.

In your aquarium

To maintain Panaqolus albomaculatus LDA-031 successfully, provide a mature, well-filtered, highly oxygenated aquarium with several cavities and accessible natural wood. A plant-based diet offered in the evening, warm stable water, and regular water changes will support long-term health. Because it is wild-collected and relatively uncommon, avoid sudden acclimation changes and monitor its appetite closely during the first few weeks. Peaceful tankmates, subdued lighting, and several shelters will help this discreet loricariid settle in with minimal stress.