Hypostomus sp. L-130

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Hypostomus sp. L-130, also known as Blackspotted Tapajos, is a South American loricariid valued for its sturdy shape and dark spotted pattern. Listed in the aquarium trade under the L-130 code, it is associated with the Rio Tapajós in Brazil and with rocky or gravelly areas of flowing water. Its mainly nocturnal habits, sucker mouth and ability to graze surfaces make it an interesting fish for a large biotope aquarium. Because it is considered Very rare in the aquarium hobby and is offered as a wild-collected specimen, careful acclimation and responsible sourcing are especially important.

General species description

Hypostomus sp. L-130 is an armored catfish in the genus Hypostomus, identified in the aquarium trade by the L-130 code rather than by an established binomial species name. It has a low, sturdy body suited to life close to the substrate and a ventral sucker mouth with adhesive lips. Activity usually increases as the aquarium lights dim. In captivity, it requires strong oxygenation, efficient filtration and shelters large enough for the fish to retreat into. Its rarity, rated Very rare here, makes it better suited to aquarists able to maintain stable conditions. A substantial aquarium is also necessary because large loricariids produce considerable waste.

Geographical origin and biotope

The L-130 form is associated with Brazil and the Rio Tapajós basin. This Amazonian system includes clear-water sections with locally strong flow, rocky outcrops, sand and gravel. Tropical riparian vegetation borders the banks, while submerged areas provide stones, roots and crevices. To reproduce these conditions, use warm, clean, well-circulated water and a secure layout that cannot collapse. Plants may not dominate rocky stretches; roots and shelters are often more useful to this bottom-dwelling fish than dense planting. Good circulation and high oxygen levels are more important than creating a heavily planted display.

Precise locality and local name

The aquarium name Blackspotted Tapajos refers to the Rio Tapajós and to the dark spotting visible on the body. L-130 is the main identifier used by specialized dealers and loricariid collectors. It should not automatically be treated as a formally described species, since the name Hypostomus sp. L-130 retains the sp. designation. In practice, the L-number helps maintain the identity of the commercial population and reduces the risk of mixing geographically distinct forms from different river systems.

Appearance and physical characteristics

The body of Hypostomus sp. L-130 is elongated, flattened along the underside and protected by rows of bony plates. Its ground color is usually dark brown to grayish, with distinct black spots that explain the name Blackspotted Tapajos. The sucker mouth helps it remain attached to solid surfaces while grazing biofilm. The fins are proportionate to the body and may be spread when the fish feels threatened. As with many large Loricariidae, coloration can change with age, stress, the aquarium layout and lighting intensity.

General diet

Hypostomus sp. L-130 makes use of plant matter and biofilm, but it should not be treated as nothing more than an algae eater. Provide sinking foods containing plant ingredients, blanched vegetables and occasional higher-protein foods. Natural wood can add grazing surfaces to the aquarium; it does not replace a balanced diet. Feeding is best done after the lights go out, which encourages natural behavior and reduces competition with daytime fish. Offer small portions regularly and remove uneaten food, since the species can contribute significantly to the aquarium’s organic load.

Essential data

• River of origin: Rio Tapajos
• Local name used: L-130
• Origin of the scientific name: Hypostomus is the genus assigned to this loricariid; sp. indicates that the aquarium name does not specify a species.
• Etymology of the full name: Hypostomus roughly means “mouth positioned below”; sp. is short for species; L-130 is an aquarium and trade code.
• Common/vernacular names: Blackspotted Tapajos, L-130
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: hy-pos-toh-mus - L one thirty
• Discovery: Maintained in the aquarium trade under the L-130 code.
• Maximum adult size: Approximately 30 cm
• Water temperature and pH: 25 to 29 °C; pH 6.0 to 7.5
• River appearance and surrounding vegetation: Clear, flowing water with rocky or gravelly substrate, roots and tropical riparian vegetation.
• Typical tankmates: Geophagus altifrons, Satanoperca jurupari, Heros sp. Tapajos, Biotodoma cupido
• Temperament and behavior: Generally peaceful toward other fish, but mainly territorial toward conspecifics around shelters; mostly crepuscular and nocturnal.
• Water depth: Shallow to intermediate bottom areas.
• Sexual dimorphism: Difficult to see in juveniles; adults may differ in head width and odontode development, but experienced examination is needed.
• Bottom structure and flow: Rocks, gravel, localized sand, roots and moderate to strong current.

In your aquarium

Success with Hypostomus sp. L-130 depends on a large, mature aquarium, oversized filtration and highly oxygenated water. Provide several rock shelters or large pieces of wood, a substrate without sharp edges and genuine current rather than only surface movement. Feed after the lights go out with a varied plant-based diet, then remove leftovers to protect water quality. Since this fish is very rare and wild collected, avoid impulse purchases and do not house it with loricariids that are excessively territorial or highly competitive for shelter and food.