Horabagrus brachysoma

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Horabagrus brachysoma, the Sun Catfish

Horabagrus brachysoma, also called the Sun Catfish or Yellow Catfish, is a large catfish native to the freshwater habitats of southwestern India. Its sturdy body, golden-brown coloration and dark mark behind the head give it a distinctive appearance. Mainly active at dusk and during the night, it searches the bottom for prey. In an aquarium, it requires plenty of room, effective filtration and tank mates of comparable size. It is generally readily available through specialized retailers, but its adult size demands careful planning before purchase.

General species description

Horabagrus brachysoma belongs to the Horabagridae family, a small group of Asian catfishes. It is a relatively large freshwater species with a stocky body and broad head. It mainly occupies calm or moderately flowing areas, staying close to the bottom and to available shelter. Activity increases as the light fades; during the day, it often remains hidden beneath roots, branches or dense plants. In aquaria, its behavior is usually peaceful toward fish too large to swallow, although its predatory instinct may affect smaller tank mates. A spacious, structured aquarium with hiding places is more suitable than a brightly lit setup without cover.

Geographic origin and biotope

Country of reference: India. Horabagrus brachysoma is endemic to Kerala, in the Western Ghats of southwestern India. It occurs in rivers, floodplain areas and connected calm-water habitats, particularly within the Periyar basin. The water may be clear to lightly stained, with low to moderate flow and many available shelters. Tropical vegetation, roots and woody debris commonly line the banks and create shaded areas. In the aquarium, stable, well-oxygenated water ranging from slightly acidic to neutral is suitable; extreme conditions are unnecessary.

Precise location and local name

The natural range of Horabagrus brachysoma lies in Kerala, along rivers and wetlands connected to the coastal basins of the Western Ghats. It is especially associated with the Periyar basin and lowland areas where freshwater slows down. In Kerala, the local name Manjakoori is used for this yellow catfish. In the aquarium trade, it is mainly sold as Sun Catfish, Sun Cat or Yellow Catfish. It is less frequently encountered than the most popular Asian catfishes, but it is generally available from specialized retailers.

Appearance and physical characteristics

Horabagrus brachysoma has a short, heavy body that is slightly compressed from side to side. The base coloration ranges from yellowish brown to golden, while a large black mark behind the head is its most recognizable feature. The fins are well developed, and the barbels help it locate food in dark water or among bottom debris. As with many catfishes, the spines of some fins can be rigid and sharp, so handling requires care. Its adult size is substantial, making a long, generously decorated aquarium more appropriate than a standard community tank.

General diet

Horabagrus brachysoma is an opportunistic predator and generalist feeder. In the wild, it catches small fish and other aquatic animals while also taking available prey from the bottom. In aquaria, it usually accepts meaty foods such as quality sinking pellets, shrimp, worms and prepared pieces of fish. Offer appropriately sized portions and avoid overfeeding, since large catfish create a significant organic load. Feeding activity is most noticeable after the lights go out. Small fish that can fit in its mouth should be avoided, as they may be treated as prey rather than tank mates.

Essential data

• Native river: Periyar
• Local name used: Manjakoori
• Origin of the scientific name: Horabagrus is the genus name; brachysoma is the specific epithet selected by Albert Günther.
• Full-name etymology: brachys means short and soma means body in Ancient Greek, referring to the species’ stocky form.
• Common/vernacular names: Sun Catfish, Sun Cat, Yellow Catfish.
• Family: Horabagridae
• Subfamily: Horabagrinae
• Name pronunciation: ho-ra-BAG-rus - bra-ki-SO-ma
• Discovery: Albert Karl Ludwig Gotthilf Günther, 1864
• Maximum adult size: about 45 cm
• Water temperature and pH: 22 to 28 °C; pH 6.5 to 8.0
• Stream appearance and surrounding vegetation: calm to moderately flowing freshwater, tropical banks, roots, submerged branches and dense vegetation.
• Typical tank or habitat companions: Etroplus suratensis, Dawkinsia filamentosa, Mystus montanus, Channa gachua.
• Temperament and behavior: generally peaceful with large fish; a discreet nocturnal predator.
• Water depth: bottom areas beneath banks, roots and submerged shelter.
• Sexual dimorphism: difficult to identify visually in juveniles; external differences are limited.
• Bottom structure and flow: muddy to sandy substrate, plant debris and woody shelter; low to moderate current.

In your aquarium

Success with Horabagrus brachysoma depends on a very spacious aquarium with sturdy hiding places, a soft substrate and filtration capable of handling substantial waste production. Moderate lighting and a dark period encourage natural behavior. Keep it with fish large enough not to be swallowed and feed it moderately with quality meaty foods. Stable water, regular maintenance and planning for its adult size of about 45 cm are the most important elements for long-term care.