Can Largereye Lampeye Killifish and Xenotilapia papilio Live Together?

Largereye Lampeye Killifish is a peaceful species (1/10), while Xenotilapia papilio is moderately assertive (6/10). This notable difference means Xenotilapia papilio may occasionally assert dominance over Largereye Lampeye Killifish.

In terms of spatial distribution, Largereye Lampeye Killifish prefers the Top (Surface) and Middle (Open Water) zones, whereas Xenotilapia papilio occupies the Bottom (Substrate) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.

Worth noting: Largereye Lampeye Killifish is a known jumper, so a tight-fitting lid is essential.

The safe temperature window for both species falls between 23°C and 28°C. Aim for the midpoint of this range (around 25.5°C) for optimal comfort.

The pH requirements of Largereye Lampeye Killifish (6–7.5) and Xenotilapia papilio (7.8–9) do not overlap, making it impossible to satisfy both species simultaneously.

For general hardness, the shared comfort zone is 10–15 dGH. Regular testing will ensure conditions stay within this range.

To house Largereye Lampeye Killifish and Xenotilapia papilio together, plan for an aquarium of at least 110 litres with a minimum length of 90 cm. This recommendation combines the stricter species minimums with a community-load allowance so the pairing has realistic long-term space and filtration headroom.

Providing a mix of open swimming space and sheltered areas with rocks, driftwood, or plants will keep both species comfortable and allow natural behaviour.

Specific environmental needs for this combination include: Plants - Densely covered, Plants - Floating, Sand (Sifters), Smooth Gravel (Sensitive Barbels). Meeting these requirements will help both species thrive.

Both species do well with low (still water) water movement, so a standard filtration setup rated for the tank volume should suffice.

Largereye Lampeye Killifish and Xenotilapia papilio are the kind of pair that can look acceptable in a shop but become a maintenance problem at home. The main risk is not a single number in the chart; it is the way incompatible behavior, water needs, or pressure on space compounds over time once both fish are established in the same tank.