Panaque bathyphilus L-090b

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Panaque bathyphilus L-090b, also called Ojo Chico - Mama, is a highly sought-after wood-eating catfish among specialized aquarists. Native to Peru, this Panaque belongs to the fauna of large Amazonian waterways and is mainly active during dusk and nighttime. The L-090b designation is a trade code used to identify this form within the aquarium hobby. Very rare in the market, it is offered as a wild-collected specimen; therefore, successful care depends on stable water, strong filtration, genuine wood and regular plant-based feeding.

General species description

Panaque bathyphilus L-090b is a large loricariid associated with deep waters in the Ucayali basin. Like other Panaque, it has a sucker mouth adapted for grazing submerged surfaces and strong teeth capable of rasping wood. The L-090b label identifies a commercial form within the L-090 complex and is commonly used to distinguish it from L-090a by appearance and collection origin. Its activity is mainly nocturnal, although acclimated specimens may emerge during the day when the aquarium is quiet. This is a fish for a large aquarium that is mature and furnished with several shelters. Because this form is rare, keeping accurate records of its origin and lineage is especially important.

Geographic origin and biotope

The L-090b form is associated with the Ucayali River basin in Peru, within a large Amazonian river environment. Its habitat includes deep sections, wooded banks and areas where trunks, branches and roots remain submerged for long periods. The water may be stained by organic matter, with generally low to moderate mineral content. In aquariums, a temperature of 26 to 30 °C, slightly acidic to neutral pH and very well-oxygenated water are suitable for maintenance. The layout should include large pieces of wood, caves and strong circulation without turning the entire aquarium into a torrent. Since it is wild collected, gradual acclimation is recommended.

Precise location and local name

The geographic name generally associated with this fish is the Ucayali River in Peru. In the aquarium trade, the L-090b designation helps preserve the identity of this form when its classification or separation from closely related Panaque is not presented under a separate name. The supplied local or trade name is Ojo Chico - Mama. “Ojo Chico” literally means “small eye” in Spanish, while “Mama” is part of the name used for this strain or type of fish in the specialized trade. This naming is mainly practical for aquarists and exporters. For such a rare form, the L-090b code should be kept with the trade name whenever specimens are transferred.

Appearance and physical characteristics

Panaque bathyphilus L-090b has the typical shape of large Panaque: a robust body, flattened underside, bony plates and a broad head equipped with a lower sucker mouth. The pectoral and dorsal fins are well developed, while the caudal fin provides propulsion in deep-water areas. Its overall coloration is dark, with variable contrasts and markings depending on age, acclimation and lighting. The L-090b form is identified mainly by the combination of its proportions, pattern and trade code rather than by one single visible feature. The rasping teeth and heavy body structure are important clues for aquarists. An adult needs substantial floor space and strong, secure shelters.

General diet

The diet of Panaque bathyphilus L-090b should contain a high proportion of plant matter and wood. Genuine wood is essential because it is rasped and supports the digestive functioning of Panaque. Offer algae-based wafers, foods intended for herbivorous loricariids and vegetables such as zucchini, cucumber or sweet potato, preferably after the aquarium lights go out. A small amount of more protein-rich food may be accepted, but it should not replace the plant-based foundation. Remove uneaten pieces before they decompose. Regular evening feeding helps wild specimens resume their natural routine. Constant access to wood and a varied diet are the most important nutritional considerations.

Essential data

• River of origin: Ucayali River
• Local name used: Ojo Chico - Mama
• Origin of the scientific name: Panaque is a traditional genus name used for these loricariids; bathyphilus describes an affinity for deep water.
• Full-name etymology: Panaque: genus name; bathyphilus: from the Greek bathys, deep, and philos, loving or having an affinity for.
• Common/vernacular names: Ojo Chico - Mama; L-090b
• Family: Loricariidae
• Subfamily: Hypostominae
• Name pronunciation: pa-na-kay ba-thi-fi-lus
• Discovery: Nathan K. Lujan, Hernán Ortega and David C. Werneke, 2010
• Maximum adult size: Approximately 35 cm
• Water temperature and pH: 26 to 30 °C; approximately pH 5.5 to 7.5
• Appearance of the watercourse and surrounding vegetation: Large Amazonian river, deep sections, submerged wood, forested banks and dense riverside vegetation.
• Typical tankmates: Large Amazonian characins, peaceful cichlids, compatible loricariids and other sturdy bottom-dwelling fish; avoid aggressive species.
• Temperament and behavior: Generally peaceful, secretive and mainly nocturnal; territorial behavior may occur around shelters and wood.
• Water depth: Deep channel sections and areas associated with large submerged trunks.
• Sexual dimorphism: Adult males may develop a broader head and more odontodes on the body and fins; young fish are difficult to sex.
• Bottom structure and flow: Bottom composed of wood, plant debris and mineral areas; generally moderate to strong flow with well-oxygenated water.

For aquarium success

Success with Panaque bathyphilus L-090b depends on a large aquarium, oversized filtration and clean, warm, well-oxygenated water. Provide several shelters, plenty of natural wood and plant-based food in the evening. Wild specimens should be acclimated patiently and watched closely during the first weeks. Avoid excessive feeding competition and territorial tankmates. Because this form is very rare, keep its L-090b identification carefully and favor responsible maintenance rather than mixing fish from different collection origins.