Featherfin Panchax (Pterolebias longipinnis)

Overview

The Featherfin Panchax (Pterolebias longipinnis) is a South American annual killifish with a slender body, long flowing fins and a specialist life history. It is also known as the Common Featherfin Panchax, but it should not be treated like an ordinary surface panchax. This species is linked to seasonal freshwater habitats, grows quickly and uses bottom substrate for spawning, with eggs adapted to survive a dry resting period.

Our current fish are supplied at about 4-6 cm. Adults can reach around 12 cm total length, so this is not a tiny nano killifish. It is peaceful by predator standards, but it is still a carnivorous annual killifish that deserves a covered, calm, species-first aquarium or very careful tank-mate choices. Choose it when you want an unusual annual-killifish project with strong visual impact rather than a plug-and-play community fish.

Quick Facts

• Scientific name: Pterolebias longipinnis
• Common names: Featherfin Panchax, Common Featherfin Panchax, Featherfin Killifish
• Approximate size supplied: 4-6 cm
• Adult planning size: up to about 12 cm total length
• Temperature: 22-26 C for routine aquarium care
• pH: 6.5-7.5, with stable clean water more important than chasing numbers
• Hardness: soft to moderately hard; FishBase records 5-8 dGH for the species
• Minimum aquarium: 80 L+ for a pair or small group; more space if mixing males
• Diet: carnivorous foods including worms, crustaceans, insects and suitable frozen/live prey
• Best for: annual-killifish keepers, covered specialist setups and aquarists who can provide spawning substrate

Visual Effect

The original reference photo shows a long, elegant fish with a reflective pink-peach body, blue-white speckling, a darker broad rear fin area, yellowish lower fins and a bright metallic eye. The name Featherfin makes sense when you look at the extended unpaired fins: the fish has a long, trailing profile that stands out strongly against plants, leaf litter and darker backgrounds.

Because the source photo is exact for this SKU, it should be used as the trust image. The existing gallery can still help customers imagine the fish in a planted aquarium, but it should support the real photo rather than replace it.

Natural Habitat

Pterolebias longipinnis is recorded from South America, including the Amazon and Paraguay River basins. FishBase describes it as a freshwater, benthopelagic species and records a diet of worms, crustaceans, insects and smaller fish. Specialist killifish references place it among the South American annual killifish, a group associated with temporary or seasonal waters where adults may live quickly and eggs carry the population through harsher periods.

Aquarium Glaser notes imports from Paraguay and describes the natural pattern clearly: in the wild, fish may live only a few months as water dries, while eggs remain in the bottom of the former water body until rain returns. In aquaria, with permanent clean water and steady feeding, fish can live longer than that, but the seasonal breeding strategy still shapes the care.

Aquarium Setup

Use a covered aquarium of at least 80 litres for a pair or small group. A tight lid matters because killifish can jump, especially during feeding, display or disturbance. The layout should combine open swimming room with planted edges, leaf litter, roots and soft visual breaks. Keep the water movement gentle and avoid a tank that is all hard current and bare glass.

Unlike a mop-spawning surface panchax, this species benefits from a soft spawning zone. Experienced keepers often use peat fibre, coir, fine spawning media or a removable container of soft substrate so eggs can be collected and incubated separately. If you are keeping the fish only for display, the same soft, shaded layout still helps them settle and show natural behaviour.

Water And Maintenance

A practical everyday range is 22-26 C, pH 6.5-7.5 and low to moderate hardness. FishBase lists pH 6.5-7.0 and 5-8 dGH, while keeper reports show successful maintenance and breeding across nearby ranges when water is clean and stable. Avoid extreme water, sudden swings and poor oxygenation.

Annual killifish are often fast-growing and food-driven, so water quality must keep up with feeding. Keep ammonia and nitrite at zero, use regular partial water changes, and remove uneaten food from the substrate. If using peat or leaf litter, monitor the tank rather than assuming dark water is automatically clean.

Feeding

This is a carnivorous species. Offer small live and frozen foods such as mosquito larvae, daphnia, brine shrimp, bloodworm, whiteworm, grindal worm and suitably sized chopped meaty foods. Good quality soft granules can be accepted by some individuals, but they should support a varied diet rather than replace it.

Feed small portions once or twice daily and watch body condition. Young fish can grow quickly, but heavy feeding without maintenance will damage water quality. The best routine is generous variety, clean water and careful observation. Fish that are preparing to spawn usually benefit from richer live and frozen foods.

Behaviour And Tank Mates

Featherfin Panchax are generally not aggressive community bullies, but they are specialist predatory killifish. Males may display and spar, especially in cramped quarters or when females and spawning sites are limited. A species-first setup is the safest choice for behaviour, breeding and feeding control.

If you try tank mates, choose calm fish too large to be eaten, with similar water needs and no habit of nipping long fins. Avoid tiny nano fish, fry, small shrimp, fin-nippers, rough cichlids and very fast feeders that will dominate every meal. For breeding, skip community tank mates and keep the group in a dedicated covered aquarium.

Breeding Notes

Pterolebias longipinnis is an annual substrate spawner. The old text suggested ordinary plant or mop spawning, but the better fit is bottom spawning into peat or similar soft media. FishBase notes bottom spawning and about three months of egg incubation, and hobby reports commonly use peat or comparable substrate.

Condition adults with live and frozen foods, provide a removable spawning container, then collect and incubate eggs according to annual-killifish practice. Fry need tiny first foods and careful water quality. This is not the easiest route for a beginner, but for a patient keeper it is exactly what makes the species special.

Delivery And Guarantee

Your Featherfin Panchax is packed for live-fish courier delivery with oxygen, insulation and weather-aware dispatch timing. The product page now includes the original reference photo for this SKU, while the existing images remain as supporting aquarium-context visuals. First-time customers can use WELCOME10 at checkout, and eligible livestock orders are covered by our Live Arrival Guarantee.

If you are comparing killifish options, choose this species for a larger South American annual killifish with dramatic finnage and substrate-spawning behaviour. Choose smaller Nothobranchius species when you want compact East African annuals, or Pachypanchax and Epiplatys species when you want non-annual surface killifish.