Can African Butterfly Fish and Fire Eel Live Together?

🟢Ideal Tank Mates

Yes, African Butterfly Fish and Fire Eel are ideal tank mates. Both species share compatible water parameters and peaceful temperaments, making them well-suited for a community aquarium. They occupy different areas of the water column, which reduces competition for space. A minimum tank size of 816 litres is recommended.


At a Glance

African Butterfly Fish

Pantodon buchholzi

Fire Eel

Mastacembelus erythrotaenia

🐟Family Group
African Butterfly Fish
Oddballs
Fire Eel
Oddballs
Temperament
African Butterfly Fish
Semi-Aggressive (5/10)
Fire Eel
Mostly Peaceful (4/10)
Temperature
✓ Compatible
African Butterfly Fish
24–30°C
Fire Eel
24–28°C
pH Range
✓ Compatible
African Butterfly Fish
6–7.5
Fire Eel
6–7.5
Hardness (dGH)
✓ Compatible
African Butterfly Fish
1–10
Fire Eel
5–15
Water Type
✓ Compatible
African Butterfly Fish
Freshwater Only
Fire Eel
Freshwater Only
Flow Preference
✓ Compatible
African Butterfly Fish
Low
Fire Eel
Moderate
Min Tank Volume
Combined: 816 L
African Butterfly Fish
80 L
Fire Eel
680 L
Swimming Level
✓ Different zones
African Butterfly Fish
Top
Fire Eel
Bottom
🏷️Behavior Tags
African Butterfly Fish
Piscivore (Eats small/nano fish)Jumper (Lid Required)Territorial (Defends specific area)Nocturnal
Fire Eel
Piscivore (Eats small/nano fish)Shrimp EaterDigger (Disturbs Substrate)Jumper (Lid Required)NocturnalShy / Slow Moving (Easily Stressed)

Behaviour & Temperament

African Butterfly Fish is a moderately assertive species (5/10), while Fire Eel is generally mild-mannered (4/10). This modest difference means African Butterfly Fish may occasionally assert dominance over Fire Eel.

In terms of spatial distribution, African Butterfly Fish prefers the Top (Surface) zone, whereas Fire Eel 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: African Butterfly Fish is nocturnal and will be most active after lights-out, naturally reducing daytime encounters. Also, African Butterfly Fish is a known jumper, so a tight-fitting lid is essential.

Water Parameters

The safe temperature window for both species falls between 24°C and 28°C. Aim for the midpoint of this range (around 26.0°C) for optimal comfort.

Both fish can tolerate a pH between 6 and 7.5. Maintaining a stable value within this band is more important than hitting an exact number.

For general hardness, the shared comfort zone is 5–10 dGH. Regular testing will ensure conditions stay within this range.

Tank Setup

To house African Butterfly Fish and Fire Eel together, plan for an aquarium of at least 816 litres with a minimum length of 180 cm. This accounts for the larger species' space requirements with an additional 20 % buffer to reduce territorial tension.

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 - Floating, Sand (Sifters), Smooth Gravel (Sensitive Barbels), Driftwood (Digestion/Hiding). 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.

Frequently Asked Questions

Can African Butterfly Fish and Fire Eel live together?

Yes. African Butterfly Fish and Fire Eel are considered ideal tank mates. Their water parameters, temperaments, and behaviour profiles are well matched for a community aquarium.

What size tank do African Butterfly Fish and Fire Eel need?

A minimum of 816 litres (tank length at least 180 cm) is recommended. This provides enough space for both species to establish their own areas and reduces the likelihood of territorial disputes.

What water temperature is best for African Butterfly Fish and Fire Eel together?

Keep the aquarium between 24°C and 28°C. A target of around 26.0°C sits comfortably within both species' preferred ranges.

Are African Butterfly Fish or Fire Eel aggressive?

African Butterfly Fish is moderately assertive (5/10) and Fire Eel is generally mild-mannered (4/10). Their similar temperaments generally lead to a peaceful coexistence.

What pH do African Butterfly Fish and Fire Eel need?

Both species overlap in the 6–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.

How do I manage African Butterfly Fish's territorial behaviour?

Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives African Butterfly Fish space to claim a territory without encroaching on the other fish's area. Adding décor that divides the tank into distinct zones works especially well.

Does African Butterfly Fish being nocturnal affect compatibility?

African Butterfly Fish is most active after lights-out, which naturally reduces daytime encounters with its tank mate. This can actually be beneficial, as both fish get undisturbed time to feed and explore. Just ensure food reaches African Butterfly Fish during evening hours.


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