Featherfin Panchax, Common (Pterolebias longipinnis) — 4-6cm

Overview

The Featherfin Panchax or Common Featherfin Panchax (Pterolebias longipinnis) is a graceful, top-dwelling panchax native to South America, particularly the Amazon basin region. With elegant finnage and a peaceful nature, this species is ideal for a calm planted aquarium. Available for sale UK from Tropical Fish Co, this captivating killifish rewards dedicated keepers with unique surface-dwelling behaviour and delicate beauty.

Appearance and Coloration

The Featherfin Panchax displays elegant colouration with a slender, elongated body adorned in soft greens, golds, and browns with delicate patterning. The most distinctive feature is the elongated, feather-like finnage—particularly the dorsal and anal fins—that creates a graceful, flowing silhouette. Males are more intensely coloured than females, with more pronounced finnage and a bolder presence. Females are smaller, plumper, and more subdued in colour with shorter finnage. In a planted tank with dark substrate, the colours and elegant finnage become even more visible and eye-catching.

Natural Habitat

Pterolebias longipinnis is native to South America, with its range reported from freshwater habitats in the Amazon basin region, though exact distribution is unknown. These fish inhabit slow-moving streams, swamps, and seasonal pools characterised by soft, slightly acidic, tannin-rich water, dense vegetation, submerged roots, and abundant leaf litter. Water flow is minimal, and the substrate consists of mud, sand, and organic debris. These surface-oriented fish spend most of their time at or near the water's surface.

Aquarium Setup

A minimum 60-litre aquarium is recommended for a pair or small group of Featherfin Panchax. Use a fine sand or smooth gravel substrate with plenty of live plants such as Cryptocoryne, Java moss, Microsorum, and floating species like Salvinia or Pistia. Provide open swimming space near the surface, as this is a surface-oriented species. Add dried leaves (Indian almond or oak) to release tannins and replicate the natural environment. Lighting should be subdued, and filtration gentle to avoid strong currents. A secure, tight-fitting lid is essential, as this species may jump.

Feeding and Diet

As a carnivore, Pterolebias longipinnis requires a varied, protein-rich diet to maintain health and colour. Offer small live and frozen meaty foods such as daphnia, brine shrimp, mosquito larvae, and bloodworms daily. Live and frozen foods are preferred, and any dry food should be considered supplemental only. This surface-oriented predator is well-adapted to capturing live prey at the water's surface. Feed small portions once or twice daily, removing uneaten food promptly to maintain water quality.

Behaviour and Temperament

The Featherfin Panchax is a peaceful, surface-dwelling species that spends most of its time patrolling the upper water column in search of food. Males may display to each other with flared fins and subtle posturing, but serious aggression is rare. These fish are most active during dawn and dusk, and they appreciate a dimly lit aquarium with plenty of surface cover. They are not competitive feeders, so avoid housing them with boisterous or fast-moving species that may outcompete them for food.

Suitable Tank Mates

Pterolebias longipinnis is best kept species-only or with very carefully chosen peaceful tankmates of similar size. Avoid small shrimp and tiny fish that may be eaten, as well as fast, boisterous, or competitive community fish. Avoid large or boisterous fish, fin-nipping species, fast-feeding community fish, predatory fish, and very small fry or shrimp that may be eaten. A calm, quiet environment is essential for this delicate killifish to thrive.

Breeding

Typically spawns in fine-leaved plants or spawning mops. Condition a pair with high-quality live foods, then provide spawning media such as Java moss or yarn mops. Eggs are often adhesive and may need careful incubation in clean water. Provide a conditioned pair, soft slightly acidic water, and abundant fine-leaved plants or spawning mops. Fry are tiny and require infusoria or liquid fry food initially, graduating to newly hatched brine shrimp. This species is sensitive to poor water quality and does best in a calm, well-maintained aquarium.

Why Buy from Tropical Fish Co

Tropical Fish Co is a trusted UK supplier of rare and specialist tropical fish, including hard-to-find killifish species like Pterolebias longipinnis. We guarantee healthy, well-conditioned stock, expert care advice, and secure nationwide delivery. Every fish is quarantined and inspected before dispatch, ensuring you receive only the finest specimens. Whether you're setting up a dedicated killifish tank or adding a rare species to your collection, Tropical Fish Co offers unmatched quality and customer service. Order online today and bring the beauty of the Amazon basin into your home aquarium.