Gabon Killifish (Aphyosemion Gabunense Marginatum)

Gabon Killifish – A Beginners Guide to Care and Breeding

Gabon Killifish (Aphyosemion Gabunense Marginatum)

Gabon Killifish (Aphyosemion Gabunense Marginatum)

The brightly colored male Gabon Killi was listed as Aphyosemion gabunesense boehmi but that variety has only yellow along the margin of the anal fin and Aphyosemion gabunense gabunense has only red. The mix of these two colors indicates marginatum.

Quick Stats

  1. Origin: Gabon
  2. Size: 4-5cm/ 1.5-2 inches
  3. Temperature: 22-25°C/ 72-77°F
  4. Diet: They can be fed flake food but they color up best when given live or frozen fare.

Sex Recognition

But whatever the variety, the male Gabon Killifish is a stunning fish. The female of the species is the second photo and as is typical among killis, she is a simple gray color.

Tank Setup

They can be kept in a community aquarium but their small size means you have to be careful when selecting tankmates for them.

Fish Nature and tank mates

They tend to be shy and easily spooked by larger or boisterous fish. When spooked, they have a tendency to launch themselves out of the water. Floating plants tend to discourage this behavior, but having a tank lid is the surest way to keep them safely within the confines of the aquarium.

Tank Size

If you only want a few fish, a ten gallon/ 37-liter fish tank is suitable and their breeding aquarium can be half that size. These are not annual killlis and they will live for more than a year.


As I already mentioned, floating plants serve an important part in an aquarium of Gabon Killifish. There should be other plants, rooted in the substrate. The best substrates include peat or dirt. Avoid light colored substrates. Do not have strong filtration and the pH should not be above neutral.


The fish chooses either to deposit eggs on a daily basis in the peat or among fine-leaved plants like Cabomba. The eggs can be left in the water…but many develop fungus if you do this. To get more fry, remove the eggs and keep them in a plastic container of damp peat. Add water after two weeks to encourage them to hatch. Be sure to have a culture of infusoria on hand to feed the tiny, slow-growing young.

Read more Brackish water profile

  1. Leaf Goblin fish – Complete Guide, Facts & Miss-understandings

Read some freshwater fish profile

  1. Freshwater Blackwing Hatchetfish – Quick Care & Keeping Guide


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