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Leiarius pictus, also known as Sailfin Pim or bagre tigre, is a large South American catfish valued for its imposing shape and very tall dorsal fin. Native to regions including Colombian waters connected with the Orinoco, it inhabits quiet areas where submerged wood and vegetated banks provide shelter. Keeping this species requires a spacious aquarium, strong filtration, and tankmates of comparable size. This wild-collected fish remains very rare in the aquarium trade; in Canada, it is available exclusively from Ton.Fish.

General species description

Leiarius pictus is a large pimelodid catfish that is mainly active at dusk and during the night. It combines an elegant profile, a tall dorsal fin, and a strongly contrasting pattern. Despite its spectacular appearance, it is not a fish for a standard community aquarium: adult size and predatory feeding require a dedicated setup. It may usually share an aquarium with robust fish that cannot be swallowed, but small tankmates may be treated as prey. Care requires well-oxygenated water, a spacious shelter, and careful control of the organic load. Available specimens are wild-collected, making acclimation and quarantine especially important.

Geographic origin and biotope

The species is associated with tropical South America, particularly the Orinoco and Amazon basins. In Colombia, it is linked to the Colombian Orinoco basin, where it uses channels, side arms, and slow areas bordered by vegetation. Its habitat generally contains warm, soft to moderately mineralized water, with plenty of cover. Branches, trunks, and tangled banks provide resting areas during the day. An aquarium should therefore include a solid layout with open swimming space and several large shelters. Filtration should keep the water clean without creating a uniformly strong current. Stable water quality is more important than reproducing one exact river condition.

Precise location and local name

In Colombia, Leiarius pictus is reported from the Orinoco drainage, particularly river systems associated with the Meta and its tributaries. The most useful vernacular name in trade and among aquarists is bagre tigre; Sailfin Pim is mainly an English trade name. Regional usage can vary, and local names may sometimes be confused with those of other spotted or striped pimelodids. Correct identification should therefore consider dorsal-fin shape, body pattern, and the provenance supplied by the exporter. This traceability is especially valuable for a very rare aquarium fish. A photograph alone may not always be enough when closely related large catfish are being compared.

Appearance and physical characteristics

The body of Leiarius pictus is elongated, powerful, and suited to life near the bottom. Its base color ranges from grayish brown to yellowish brown, with irregular dark spots that create the characteristic tiger-like appearance. The dorsal fin is unusually tall and explains the name Sailfin Pim. As in several pimelodids, the mouth is surrounded by long barbels used to detect obstacles and food in dim water. The pectoral and dorsal fins contain stiff spines, so handling requires an appropriate net and care. Its large size and barbels give it the appearance of a benthic predator, while the contrasting pattern remains most visible under subdued lighting.

General feeding

Leiarius pictus is an opportunistic carnivore that mainly consumes animal prey available in the water column or near the bottom. Its natural diet includes fish and larger invertebrates; in aquaria, suitable foods include quality carnivorous pellets, shrimp pieces, prepared fish, and other diets intended for large catfish. Meals should be proportional to its size and offered in amounts that limit leftovers. Regular feeding with feeder goldfish is best avoided because of nutritional and health concerns. Young fish can be fed more often, while adults benefit from a controlled schedule. Its nocturnal hunting behavior makes evening feeding appropriate, with growth and body condition monitored regularly. A varied, protein-rich diet supports development without encouraging excessive fat accumulation.

Essential data

• Native river Orinoco basin, particularly the Meta river system in Colombia
• Local name used Bagre tigre
• Origin of the scientific name Leiarius is the genus name; pictus is the specific epithet
• Full-name etymology Pictus means painted or colored in Latin; Leiarius is a Latinized genus name
• Common or vernacular names Sailfin Pim, bagre tigre
• Family Pimelodidae
• Subfamily Pimelodinae
• Name pronunciation lay-AIR-ee-us - PICK-tus
• Discovery Franz Steindachner, 1876
• Maximum adult size About 60 cm
• Water temperature and pH 24 to 28 °C; pH about 6.0 to 7.5
• Typical watercourse and surrounding vegetation Quiet channels and side arms, vegetated banks, submerged trunks and branches
• Typical tankmates Cichla orinocensis, Astronotus ocellatus, large characins, and other robust catfish
• Temperament and behavior Predator, generally calm toward fish too large to swallow; mainly nocturnal
• Water depth Deep channels and quiet bottom areas
• Sexual dimorphism Limited; mature females may have a fuller abdomen
• Bottom structure and flow Muddy or sandy bottom, woody debris, and low to moderate flow

In your aquarium

Success with Leiarius pictus begins with an aquarium designed for its eventual growth rather than a temporary setup. Provide substantial floor space, a secure lid, shelters without sharp edges, and filtration capable of handling a high organic load. Keep water stable at 24–28 °C, remove uneaten food quickly, and offer controlled carnivorous meals. Tankmate selection is critical: any fish small enough to fit in its mouth may disappear. Because these specimens are wild-collected and very rare, thorough quarantine and gradual acclimation are strongly recommended. Planning for its adult size before purchase is one of the most important decisions for long-term welfare.