Megalancistrus parananus L-113

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Megalancistrus parananus L-113, also sold as the Giga Pink Ancistrus, is a giant loricariid from the Rio Paraná basin in Brazil. Its robust shape, ventral sucker mouth and pinkish to brownish coloration make it a spectacular fish for experienced aquarists. This bottom-dwelling species spends much of its time on rocks, submerged wood and the substrate, especially when the lights are dim. Very rare in the trade, it requires a large aquarium, powerful filtration and well-oxygenated water. The specimen presented here is collected from the wild and is offered exclusively by Ton.Fish in Canada.

General species description

Megalancistrus parananus L-113 is a large armored catfish belonging to the family Loricariidae. It differs from common bristlenose plecos through its impressive growth, massive body and broad head. Like many loricariids, it uses its ventral mouth to cling to surfaces and graze on food deposits. It is mainly active at dusk and during the night, although adults may also appear during the day when they feel secure. Despite its trade name, the pink coloration is not necessarily uniform; it varies with age, lighting, substrate and overall condition. Its care is better suited to a public aquarium or specialized installation than to an ordinary community tank. With a trade status classified as very rare, it is intended for aquarists able to plan for its long-term development.

Geographic origin and biotope

The species comes from Brazil, within the Rio Paraná basin. It inhabits bottom areas where rocks, boulders and submerged wood provide resting surfaces and shelter. Current can be strong, particularly in rocky sections, which explains the importance of well-oxygenated water in the aquarium. Vegetation is mainly found along the banks and in quieter areas; the habitat occupied by the fish is generally dominated by mineral structure and wood rather than dense aquatic plants. To recreate this environment, prioritize a large bottom area, sturdy shelters and sufficient clearance between decorations. Strong circulation, without excessive turbulence throughout the aquarium, is preferable to stagnant water. The offered specimen is wild-caught, making gradual acclimation especially important.

Precise location and local name

The reference location is the Rio Paraná in Brazil, within the extensive Paraná–Paraguay drainage system. In its country of origin, loricariids are commonly called cascudo, a popular term associated with armored catfish that cling to surfaces. In the international aquarium trade, Megalancistrus parananus L-113 is mainly identified by the code L-113 and the trade name Giga Pink Ancistrus. The L number does not replace the scientific name; it helps identify a loricariid form or population in the aquarium trade. To avoid confusion, it is best to use the scientific name, the L-113 code and the origin information together. This traceability is especially useful for a rare, large-growing fish.

Appearance and physical characteristics

Megalancistrus parananus L-113 has a broad, heavy body protected by bony plates, with a proportionally large head and an inferior mouth adapted for attachment. Coloration ranges from pinkish brown to grayish pink, sometimes with spotting or darker tones depending on conditions. The fins are well developed, and the dorsal fin can create a tall profile in adults. Odontodes, small dermal structures typical of loricariids, become more visible with maturity, particularly in males. The overall appearance is robust and prehistoric, very different from that of a small store-bought bristlenose. Its adult size requires an aquarium with substantial length, good width and decorations strong enough to withstand a powerful fish. Its most striking feature remains its status as a giant among bristlenose-type plecos.

General diet

Megalancistrus parananus L-113 is primarily herbivorous with an omnivorous tendency. Its diet should be based on vegetable sinking wafers, spirulina tablets and blanched vegetables such as zucchini, cucumber, spinach or green beans. Natural wood is also recommended in the layout because it provides grazing surfaces and contributes to dietary variety. Small portions of richer, protein-based foods may be offered occasionally, but they should not form the foundation of the diet. Meals are best provided after the lights go out, when the fish becomes more active. Remove leftovers to protect water quality, especially in a heavily fed large aquarium. A varied diet supports steady growth and helps reduce the risks associated with insufficient fiber.

Essential data

• River of origin: Rio Paraná
• Local name: Cascudo
• Origin of the scientific name: A descriptive genus name combined with a geographic name linked to Paraná
• Etymology of the full name: Megalancistrus approximately means “large Ancistrus”; parananus means “from Paraná”
• Common or vernacular names: Giga Pink Ancistrus; Cascudo; L-113
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: meg ah lan SIS truss - par ah NAN us
• Discovery: Wilhelm Karl Hartwich Peters, 1881
• Maximum adult size: Approximately 60 cm
• Water temperature and pH: 23 to 28 °C; pH 6.0 to 7.5
• Watercourse appearance and surrounding vegetation: Rocky sections with variable current, submerged wood and mainly riverside vegetation
• Typical tankmates: Geophagus sveni, Salminus brasiliensis, Hoplias malabaricus, Hypostomus luteus
• Temperament and behavior: Generally peaceful, bottom-oriented and territorial toward competing loricariids; mainly active at night
• Water depth: Bottom areas from the margins to deeper sections
• Sexual dimorphism: Mature males generally develop more pronounced odontodes and a larger head
• Bottom structure and flow: Rocky or gravelly bottom with submerged wood; moderate to strong flow and well-oxygenated water

In your aquarium

Success with Megalancistrus parananus L-113 requires a very large aquarium, oversized filtration and circulation that provides excellent oxygenation. Offer several sturdy shelters, natural wood and regular vegetable foods. Because this specimen is wild-caught and very rare, acclimation should be slow, with close observation during the first weeks. Its potential size and territorial behavior toward similar loricariids must be considered before purchase. This species is offered exclusively by Ton.Fish in Canada; it is intended for aquarists prepared to provide a permanent, specialized setup.