Panaque bathyphilus L-090a

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Panaque bathyphilus L-090a, also called Ojo Chico or Papa Lyretail, is a large South American loricariid sought after by specialized aquarists. Associated with the Ucayali basin in Peru, it is distinguished by its sturdy shape, ventral mouth adapted to scraping wood, and well-developed fins. This L-090a form remains an uncommon arrival in the aquarium trade, giving it particular value among collectors. Like several Panaque, it requires a spacious aquarium, clean water, and a diet rich in plant matter and wood. Its care is best suited to experienced aquarists.

General species description

Panaque bathyphilus L-090a is a large loricariid belonging to the Panaque group, bottom-dwelling fish specialized in scraping surfaces and consuming wood. Its heavy body and broad head give it an imposing appearance. It is mainly active at dusk and during the night, when it explores logs, roots, and stones. The L-090a form is very rare in aquarium shipments. It is best kept in a very spacious, well-filtered aquarium furnished with numerous sturdy hiding places.

Geographic origin and biotope

This form is associated with the Ucayali basin in Peru, in the western Amazon. It inhabits river sections where the current may be strong and submerged logs provide food, shelter, and resting surfaces. The water is generally warm, soft to moderately mineralized, and seasonally variable in organic content. In an aquarium, stable, well-oxygenated water free of accumulated waste is more important than reproducing every natural value exactly. A layout rich in real wood is essential.

Precise location and local name

The provenance generally associated with Panaque bathyphilus L-090a is the Rio Ucayali in Peru. Ojo Chico is used as a trade name for this form, while Papa Lyretail appears in the English-language and international aquarium trade. L-numbers such as L-090a identify loricariids that entered the trade before complete taxonomic identification. In a collection, keeping the L-090a code together with the scientific name helps prevent confusion with similar forms.

Appearance and physical characteristics

The body is stocky, armored, and adapted to life on the bottom. The base coloration is dark, usually brownish gray to blackish, with paler markings that may vary with age, origin, and condition. The broad head has a ventral mouth with rasping lips, a characteristic Panaque feature. The fins are well developed, and the caudal fin may be elongated, which relates to the name Papa Lyretail. Its sturdy morphology and need for wood distinguish it from the small algae-eating plecos sold as simple cleaners.

General diet

Panaque bathyphilus L-090a should receive a mainly plant-based, fiber-rich diet. Soft, thoroughly cleaned wood should always be available because it contributes to both feeding and digestion. Supplement with spirulina-based wafers, herbivorous loricariid tablets, and vegetables such as zucchini, cucumber, or sweet potato. A small amount of more protein-rich food may occasionally be offered, but it should not form the basis of the diet. The priority is an abundant supply of fiber and cellulose, offered mainly in the evening.

Essential data

• Name of source river: Rio Ucayali
• Local name used: Ojo Chico
• Origin of the scientific name: Panaque is the genus name; bathyphilus refers to an affinity for deep environments.
• Etymology of the full name: Panaque is a vernacular name adopted in taxonomy; bathyphilus comes from the Greek bathys, deep, and philos, loving or attracted to.
• Common/vernacular names: Ojo Chico; Papa Lyretail
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: pa-na-kay bath-ee-fi-lus
• Discovery: Trade identification under the L-090a code; the collector's full name and year are not provided.
• Maximum adult size: About 40 cm
• Water temperature and pH: 25 to 29 °C; pH 6.0 to 7.5
• Appearance of the watercourse and surrounding vegetation: Warm Amazonian watercourse with submerged wood, forested banks, and dense riparian vegetation.
• Typical tankmates: Large characins, peaceful Amazonian cichlids, other open-water fish, and compatible loricariids.
• Temperament and behavior: Generally peaceful, territorial around shelters; mainly crepuscular and nocturnal.
• Water depth: Deep sections and bottom areas associated with submerged logs.
• Sexual dimorphism: Difficult to see in juveniles; adults may show differences in head width and odontode development.
• Bottom structure and flow: Sandy or muddy bottom mixed with wood and debris; variable, often well-oxygenated flow.

In your aquarium

Success with Panaque bathyphilus L-090a begins with tank volume: an adult of this size needs a long, sturdy, well-filtered aquarium. Provide several shelters, plenty of natural wood, moderate to strong flow, and excellent oxygenation. Feed after the lights go out and remove uneaten vegetables. Because this form is very rare and wild-collected, acclimation should be gradual and specimen origins should be carefully retained. Avoid housing it with aggressive or overly competitive fish.