Max Size: 6cm

Steel Blue Lyretail Killifish (Fundulopanchax gardneri)

The Steel Blue Killifish is a robust killi that can be housed with other fish. However, they are not suitable for the general community aquarium as they can be very aggressive with small, slow-moving fish and has a surprisingly large mouth for its size. These Killifish are also known to be aggressive towards one another, so make sure you provide sufficient space and hiding places; that way, you can maintain a group together.

The Steel Blue Killifish has a gorgeous blue-steel colouration and a variable red-spotted patterning along the length of the body. The outer margins of the anal, dorsal and caudal fins are fringed with bright yellow.

The female has brown dots on its flanks and a duller colouration on the fins.

Several ornamental strains have also been line-bred by aquarists including gold and albino colours.

These fish have been known to live in very shallow waters and can jump from stream to stream so you will need to keep a very tight lid on your aquarium as they can escape through the smallest gap.


Steel blue lyretail killifish
Steel blue lyretail killifish
Steel blue lyretail killifish
Steel blue lyretail killifish
Steel blue lyretail killifish
Steel blue lyretail killifish
Quick Facts
Scientific NameFundulopanchax gardneri
Other NamesBlue Lyretail, Steel-blue Aphyosemion, Gardner's killi, Gardneri Panchax Killifish
OriginsCameroon, Nigeria
Aquarium LevelBottom - Middle
DifficultyBeginner - Intermediate
Best kept asGroups 5+
Lifespanup to 3 years
Water Parameters
Water TypeFreshwater
PH6.0 - 7.5
GH5 - 12
KH5 - 8
TDS18 - 179
72 - 77℉
22.2 - 25℃


In the home aquarium, the Steel Blue Lyretail Killifish will readily accept most good quality dried foods such as granules, flakes and sinking pellets. These modern food products have been developed to provide all adequate nutrition to maintain your fish's health and dietary requirements.

Providing additional foodstuffs such as live, frozen, and freeze-dried meals such as bloodworm, daphnia, and tubifex once or twice a week will provide additional benefits to your fish's health and well-being but is not a must for this fish.

It should be noted that bloodworms should only be given as an occasional treat and should not be used as the staple diet as they are difficult for fish to digest and can potentially cause blockages.

This fish is an omnivore in the wild, meaning it will consume some vegetable matter. Although most modern fish foods take this into account and include them in their products, you can still supplement your fish's diet with blanched vegetables such as spinach, broccoli, and zucchini. Ensure you do not overfeed your fish and remove any leftovers the following day.

Sexual Dimorphism

Sexing the Steel Blue Killifish is relatively easy. The males are larger, more colourful and have larger, more extended fins than the females. In comparison, females are smaller and less brightly coloured than males.

Other Killifish of interest

American Flagfish(Jordanella floridae)
Blackfin Pearl Killifish(Austrolebias nigripinnis)
Blue Striped Rivulus Killifish(Rivulus Xiphidius, Laimosemion xiphidius)
Bluefin Killifish(Lucania goodei)
Bluefin Notho(Nothobranchius rachovii)
Chevaliers Epiplatys Killifish(Epiplatys chevalieri)
View all Killifish
Date Added: 04/11/2020 - Updated: 10/08/2022 11:28:59