Scheel's Killie (Aphyosemion scheeli) — 3-4cm

Overview

The Scheel's Killie (Aphyosemion scheeli) is a stunningly coloured West African killifish native to the coastal rainforest streams and swampy habitats of southern Cameroon. Reaching just 3cm in length, this peaceful nano species is perfect for planted aquariums and dedicated species tanks. With vibrant metallic hues, delicate finnage, and fascinating reproductive behaviour, Aphyosemion scheeli rewards patient keepers with a living jewel that thrives on live foods and soft water. Available for sale UK from Tropical Fish Co, this rare killifish is ideal for experienced aquarists seeking a challenge and a spectacle in equal measure.

Appearance and Coloration

Scheel's Killie displays dazzling metallic colours ranging from turquoise and emerald green to red and orange, often with intricate patterning on the body and fins. Males are more intensely coloured than females, with elongated unpaired fins that shimmer under subdued lighting. The caudal fin is lyre-shaped, and the body is slender and streamlined. Females are smaller, plumper, and more subdued in colour. In a well-maintained planted tank with dark substrate and tannin-stained water, the colours become even more vibrant and eye-catching.

Natural Habitat

Aphyosemion scheeli inhabits shallow, slow-moving streams, swamps, and seasonal pools in the coastal rainforests of southern Cameroon. These biotopes are characterised by soft, acidic, tannin-rich water, dense vegetation, submerged roots, and leaf litter. Water flow is minimal, and the substrate consists of mud, sand, and organic debris. During the wet season, these fish spawn among fine-leaved plants; in the dry season, some habitats may dry up, though A. scheeli is not a strict annual species.

Aquarium Setup

A minimum 25-litre aquarium is sufficient for a pair or small group of Scheel's Killies. Use a fine sand substrate with plenty of live plants such as Cryptocoryne, Java moss, Microsorum, and floating species like Limnobium or Salvinia. Add dried leaves (Indian almond or oak) to release tannins and replicate the natural blackwater environment. Provide spawning mops or fine-leaved plants for egg deposition. Lighting should be dim, and filtration gentle to avoid strong currents. A secure, tight-fitting lid is essential, as killifish are skilled jumpers.

Feeding and Diet

As a carnivore, Aphyosemion scheeli requires a varied, protein-rich diet to maintain health and colour. Offer small live or frozen foods such as daphnia, baby brine shrimp, mosquito larvae, bloodworms, grindal worms, and microworms daily. High-quality micro-pellets or flakes may be accepted, but live and frozen foods are essential for conditioning and breeding. Feed small portions twice daily, removing uneaten food promptly to maintain pristine water quality. Variety and freshness are critical for optimal health and vibrant colouration.

Behaviour and Temperament

Scheel's Killie is a peaceful, shy species that spends most of its time in the upper and middle water column among plants. 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 dimly lit aquariums with plenty of cover. They are not competitive feeders, so avoid housing them with boisterous or fast-moving species. In a well-planted species tank, they display natural behaviours and may spawn regularly.

Suitable Tank Mates

Aphyosemion scheeli is best kept in a species-only aquarium or with very small, peaceful, non-nippy fish that share similar water requirements. Suitable companions include tiny rasboras like Boraras species, Microdevario, or small peaceful top/midwater fish in larger, heavily planted tanks. Avoid large fish, aggressive species, fin-nippers, and fast boisterous community fish. Shrimp may be eaten, especially shrimplets. A calm, quiet environment is essential for this delicate killifish to thrive and display its full range of colours.

Breeding

Aphyosemion scheeli spawns in fine-leaved plants or spawning mops. Condition a pair or small group with high-quality live foods, then provide spawning media such as Java moss or yarn mops. Eggs are laid among vegetation and may be incubated in water or on damp peat depending on the method and strain. Fry are tiny and require infusoria or liquid fry food initially, graduating to newly hatched brine shrimp after a few days. Remove adults to prevent egg and fry predation. Breeding success is highest in soft, slightly acidic water.

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 Aphyosemion scheeli. 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 Cameroonian rainforests into your home aquarium.