Moderate
Gold Gardneri Killifish (Aphyosemion gardneri Gold)
22–26°C · pH 5.8–7.2 · 20L
£9.99
A small Gabon rainforest killifish supplied around 3-4 cm, best in a covered, quiet, soft-water planted aquarium with small live or frozen foods.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Product-photo provenance and any image-specific limitations are stated on the listing.
Aphyosemion gabunense
Save when buying multiple fish. Each quantity is one fish; sex and pair formation are not guaranteed unless the selected variant explicitly states them.
A small Gabon rainforest killifish supplied around 3-4 cm, best in a covered, quiet, soft-water planted aquarium with small live or frozen foods.
Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller — pick a size variant above for the actual shipping size. Product-photo provenance and any image-specific limitations are stated on the listing.
Maintain these water conditions for optimal health and vibrant colors
Yellow-Green Gabon Killie is a small, colourful rainforest killifish from Gabon, best listed as Aphyosemion gabunense. The supplier name Yellow-Green Killie, Gabon is retained naturally here because it is useful for identifying the exact stock, but the page no longer repeats buyer phrases just to chase search terms.
This listing is for young fish supplied at approximately 3-4 cm. Plan for an adult fish around 5 cm, not a permanently tiny 4 cm nano fish: FishBase and specialist killifish references list males to about 5 cm total length. It is a modest-sized species, but it still deserves stable water, a covered aquarium and calm tank mates.
FishBase records Aphyosemion gabunense from Africa, including the lower Ogowe and lower Ngounie river systems. The American Killifish Association/WAK reference places the species in north-western Gabon, including the Lambarene and Fougamou region, and describes a small area in the lower Ogowe and lower Ngoume drainages.
The habitat matters. FishBase describes swamps and brooks in coastal rainforest, while the WAK notes coastal rainforest swamps and brooks and gives type-locality water that was very soft. This is not a bright, hard-water community fish. In the aquarium, aim for a mature planted tank with dim areas, floating cover, leaf litter or botanical cover if you use it safely, fine plants, roots and gentle filtration.
Settled males show why this species is worth the careful setup. The body can glow greenish to yellow-green with red spotting and strongly coloured unpaired fins. The WAK notes heavy red margins to all unpaired fins, and Aquarium Glaser describes the Gabon killi as a colourful, hardy and approachable killifish that reaches about 5 cm.
Females are usually quieter in colour, so the display is strongest when the fish are settled, feeding well and not competing with fast tank mates. Use a dark or natural background, shaded planting and a calm routine. Under bright open lighting the fish may look washed out and spend too much time hiding.
A covered aquarium is essential because killifish are excellent jumpers. For a pair or small group, use a stable planted aquarium of around 45-60 litres or more. Smaller breeding boxes can be used by experienced keepers, but a shop-bought display or first killifish setup should prioritise stability and room for cover.
Indian almond leaves, alder cones or other botanicals can be useful if you already understand how they affect your water. They are not magic, but they can help create a softer, more sheltered rainforest-brook feel. Avoid sharp decor, boisterous tank mates and strong current.
FishBase lists 22-25 C and pH 6.5-7.2, while Killi.co.uk breeding reports point to moderately soft acidic water at 20-23 C. A practical target for home care is 22-24 C, pH around 6.2-7.0 and low to moderate hardness.
Acclimate slowly, especially if your water is harder than the supplier range. Sudden changes in hardness or temperature are a common reason small killifish fail after arrival.
Aphyosemion gabunense is a small carnivorous killifish. Offer small live and frozen foods such as daphnia, cyclops, baby brine shrimp, mosquito larvae, grindal worm and finely chopped bloodworm where appropriate. Many individuals will also take fine quality granules or small soft prepared foods once settled, but live and frozen foods are the best route to colour, condition and breeding readiness.
Feed little and often. The fish are not built to compete with fast barbs, danios or pushy community fish, and uneaten rich foods can quickly spoil a small soft-water tank. Watch each fish feed, especially newly arrived females and subordinate males.
This is a peaceful, fairly shy killifish. It is usually best as a pair, trio or small species-focused group in a quiet planted aquarium. Males may display and posture, so use visual breaks and extra cover if keeping more than one male.
If you keep it with other fish, choose only very calm species that share similar soft-water conditions and will not dominate food. Tiny rasboras, small peaceful tetras or gentle bottom dwellers may work in larger planted tanks, but a species setup is the safest choice if you want full colour and breeding behaviour. Avoid fin nippers, fast feeders, large fish, aggressive dwarf cichlids and any fish likely to stress or outcompete them.
This is not a strict annual killifish. FishBase notes it is not seasonal, and Killi.co.uk reports long-term breeding where fry can appear with adults in moderately soft acidic water. WAK notes eggs laid in top mops, with later reports also finding eggs in peat fibre and bottom mops.
For a breeding attempt, condition the adults with small live foods and provide Java moss, fine plants or spawning mops. Eggs may be water-incubated, and specialist reports describe clear eggs hatching after roughly 18-22 days at about 72 F, with fry taking newly hatched brine shrimp once large enough. Breeding is possible, but the best results come from patient, species-focused husbandry rather than a busy community tank.
Yellow-Green Gabon Killie suits keepers who like quiet planted aquariums, soft-water species and fish with subtle behaviour rather than constant movement. It is a good choice for someone who can offer cover, small foods, stable water and a careful acclimation routine. It is less suitable for hard-water community tanks, uncovered aquariums or busy displays with large active fish.
The exact Petra/source photo has been added to help you judge the fish honestly, while the existing aquarium visuals remain in the gallery for planted-tank context. Your fish may arrive as young stock around 3-4 cm and colour will continue to improve with settling, diet and maturity.
Eligible livestock orders are packed carefully and supported by the Tropical Fish Co Live Arrival Guarantee. Please be ready to receive the parcel, acclimate slowly and move the fish into a mature, covered aquarium with matching water conditions.
Care details were checked against FishBase for distribution, maximum size, pH and temperature; AKA/WAK reference notes for Gabon locality, habitat and breeding; Killi.co.uk breeding reports for soft acidic water and long-term spawning; and Aquarium Glaser for aquarium trade size and general hardiness. These references are used to keep the page useful for aquarists, not to stuff search phrases.
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