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Spectracanthicus immaculatus L-269 is a highly sought-after South American loricariid among specialized aquarists. Associated with the rio Tapajós basin in Brazil, this bottom-dwelling fish has a robust body, a ventral sucker mouth, and dark coloration. The L-269 code reflects its history in the aquarium trade before its scientific identification became established. This species is very rare, and the specimens offered are wild collected. It is available exclusively from Ton.Fish in Canada, making it an especially interesting addition to an aquarium dedicated to South American loricariids.

General species description

Spectracanthicus immaculatus L-269 is an armored catfish from the family Loricariidae, adapted to life close to the bottom. Its body is protected by bony plates, while its ventral mouth allows it to hold onto hard surfaces and graze on food deposits. It is a rare aquarium fish, especially valued by keepers of loricariids from the Amazon basin. Its activity is mainly crepuscular and nocturnal, although a well-acclimated specimen may appear during the day. A mature, well-oxygenated aquarium with structured décor suits its natural behavior better than a bare tank.

Geographic origin and biotope

The species is associated with Brazil, in the rio Tapajós basin. It inhabits sections of river where rocks, roots, and submerged wood provide resting surfaces and feeding areas. Clear to slightly tea-colored water, rich in oxygen and marked by moderate to strong flow, broadly matches its natural requirements. In the aquarium, efficient filtration, well-distributed circulation, and a temperature of 26 to 30 °C are recommended. A pH of 6.0 to 7.5 is generally suitable, provided the water remains stable and low in organic waste.

Precise location and local name

The most consistent trade name is L-269, used in the international loricariid trade. The name Spectracanthicus immaculatus L-269 is now applied to fish matching this form. A Brazilian local name is not commonly used in the aquarium hobby; the terms L-269 pleco or Tapajós loricariid are more often encountered. As with many fish sold under an L-number, visual identification should take provenance and comparison with related species into account. This is especially important for a very rare fish that is not regularly available.

Appearance and physical characteristics

Spectracanthicus immaculatus L-269 has a stocky body, a broad head, and an inferior mouth with lips adapted for adhesion to hard surfaces. Its pectoral and dorsal fins are strong, while the bony plates give the body a clearly armored appearance. The overall coloration is dark, with pale contrasts that may vary with age, origin, and acclimation. Its body shape and sucker mouth are the most useful features for a quick identification. Adult size remains moderate for a specialized loricariid, allowing it to be kept in a large community aquarium that is properly arranged.

General diet

Its diet should combine plant matter with high-fiber foods. Offer algae-based sinking wafers, complete bottom-feeder pellets, and vegetables such as zucchini or cucumber. Natural wood can also be important in the setup and feeding behavior of several loricariids. Feed Spectracanthicus immaculatus L-269 mainly after the lights have been dimmed or turned off, and remove uneaten food. A varied diet offered in small portions helps prevent weight loss and supports good condition. Algae growing in the aquarium should not be its only food source.

Essential data

• Original river: Rio Tapajós
• Local name used: L-269; L-269 pleco
• Origin of the scientific name: Name assigned when the species was described
• Etymology of the full name: Spectracanthicus combines Greek roots referring to appearance and spines; immaculatus means spotless or immaculate; L-269 is an aquarium-trade code for a loricariid
• Common or vernacular names: L-269 pleco; Tapajós loricariid
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: spek-tra-KAN-thi-kuss im-ma-ku-LA-tuss
• Discovery: Franz Steindachner, 1907
• Maximum adult size: About 20 cm
• Water temperature and pH: 26 to 30 °C; pH 6.0 to 7.5
• Stream appearance and surrounding vegetation: Rocky, well-oxygenated Amazonian watercourse with submerged wood, roots, and riparian vegetation
• Typical tankmates: Small peaceful characins, calm South American cichlids, and other midwater fish suited to the same parameters
• Temperament and behavior: Peaceful, discreet, mainly crepuscular and nocturnal; territorial mainly toward conspecifics around shelters
• Water depth: Bottom areas
• Sexual dimorphism: Adult males generally have a broader head and more developed odontodes; young fish are difficult to sex
• Bottom structure and flow: Rocks, coarse sand, roots, and wood; moderate to strong current

In your aquarium

Keeping Spectracanthicus immaculatus L-269 successfully requires a mature, spacious, and stable aquarium with several shelters made from rocks, tubes, and wood. Warm, clean, highly oxygenated water is essential, as is regular feeding after the lighting is reduced. Because this fish is very rare and wild collected, acclimation should be gradual and transport should be carefully planned. Its status as a Ton.Fish exclusive in Canada also calls for responsible care and the avoidance of aggressive or overly competitive tankmates.