Can Dwarf Pea Puffer and Golden Wonder Killifish Live Together?
Dwarf Pea Puffer and Golden Wonder Killifish are not recommended as tank mates due to piscivorous fish will prey on nano-sized tank mates.. Housing these species together is likely to result in stress, health problems, or direct harm to one or both fish.
At a Glance
Behaviour & Temperament
Dwarf Pea Puffer is a semi-aggressive species (8/10), while Golden Wonder Killifish is moderately assertive (6/10). This modest difference means Dwarf Pea Puffer may occasionally assert dominance over Golden Wonder Killifish.
In terms of spatial distribution, Dwarf Pea Puffer prefers the Middle (Open Water) and Bottom (Substrate) zones, whereas Golden Wonder Killifish occupies the Top (Surface) zone. Because they use different levels of the water column, territorial disputes are less likely and the tank will appear more balanced.
There is a critical concern: the Nano / Bite-sized (Predation Risk) behaviour of one fish directly conflicts with the Piscivore (Eats small/nano fish) trait of the other — piscivorous fish will prey on nano-sized tank mates..
Additional behavioural considerations to keep in mind: Shrimp eaters may also prey on very small nano fish.
Worth noting: Golden Wonder Killifish is a known jumper, so a tight-fitting lid is essential.
Water Parameters
The safe temperature window for both species falls between 22°C and 28°C. Aim for the midpoint of this range (around 25.0°C) for optimal comfort.
Both fish can tolerate a pH between 6.5 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 5–15 dGH. Regular testing will ensure conditions stay within this range. An aquarium test kit is recommended for monitoring.
Tank Setup
To house Dwarf Pea Puffer and Golden Wonder Killifish together, plan for an aquarium of at least 90 litres with a minimum length of 60 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 - Densely covered, Sand (Sifters), Plants - Floating. 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.
Find the right tank equipment
Browse tanks, décor, and equipment suited for this setup.
Diet & Feeding
Feeding time deserves special attention with this pairing. Golden Wonder Killifish is a known shrimp eater and may prey on small invertebrates or nano fish like Dwarf Pea Puffer.
Frequently Asked Questions
Can Dwarf Pea Puffer and Golden Wonder Killifish live together?▾
No. This combination is not recommended. Key incompatibilities — such as critical behavioural conflicts — make cohabitation unsafe.
What size tank do Dwarf Pea Puffer and Golden Wonder Killifish need?▾
A minimum of 90 litres (tank length at least 60 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 Dwarf Pea Puffer and Golden Wonder Killifish together?▾
Keep the aquarium between 22°C and 28°C. A target of around 25.0°C sits comfortably within both species' preferred ranges.
Are Dwarf Pea Puffer or Golden Wonder Killifish aggressive?▾
Dwarf Pea Puffer is semi-aggressive (8/10) and Golden Wonder Killifish is moderately assertive (6/10). Their similar temperaments generally lead to a peaceful coexistence.
What pH do Dwarf Pea Puffer and Golden Wonder Killifish need?▾
Both species overlap in the 6.5–7.5 pH range. Consistency is key — avoid sudden swings, and test regularly to stay within this window.
Will Dwarf Pea Puffer nip Golden Wonder Killifish's fins?▾
Dwarf Pea Puffer is a known fin nipper. If Golden Wonder Killifish has long or flowing fins, there is a real risk of fin damage. Keeping Dwarf Pea Puffer in a larger group can help redirect nipping behaviour toward conspecifics.
How do I manage Dwarf Pea Puffer's territorial behaviour?▾
Provide line-of-sight breaks using rocks, driftwood, and dense planting. A larger tank gives Dwarf Pea Puffer 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.
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