Compatibility brief
Can Golden Wonder Killifish live with Guppy?
Risky. This mix is commonly discouraged for typical setups.
Compatibility score
Profile confidence: low
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
80L
Combined minimum footprint reference for these two species: about 80L (larger active fish often want more length).
Temperament gap (semi-aggressive vs peaceful) adds stress on top of the hard incompatibility — space and cover do not make this pairing safe.
Assessment details
Temperament difference
Golden Wonder Killifish is semi-aggressive, while Guppy is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely.
Golden Wonder Killifish may eat Guppy
Top issueGolden Wonder Killifish (10cm) is predatory and Guppy (5cm) is small enough to be eaten. This pairing is unsafe.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“Golden Wonder Killifish (10cm) is predatory and Guppy (5cm)…”
Golden Wonder Killifish may eat Guppy
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Guppy can escape if harassed.
Try instead
- →Build a species-only tank for the larger fish, or restock with fish too large to be eaten at adult sizes.
- Seriously Fish. Aplocheilus lineatus
Primary: species page covering Indian/Sri Lankan range, predatory behaviour, jumping risk, and surface-dwelling habit.
- Aquarium Co-Op. Golden Wonder Killifish Care
Secondary: retailer care page on stocking (top-dweller-only setups, jumping lid requirement, live feed).
- Seriously Fish. Poecilia reticulata
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Poecilia reticulata
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Poecilia reticulata
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Wikipedia. Guppy
Encyclopaedia overview; use specialist aquarium sources for your stock's real temperature/pH/footprint needs.
Try this next
Build the full stocking list with Golden Wonder Killifish + Guppy
Plan further
Check each species’ mates list, size the glass, then verify the full stock in the builder. Methodology explains how verdicts are produced.
Individual fish vary in personality. Fishori uses conservative hobby rules. Observe any new introduction closely, feed thoughtfully, and keep a quarantine or backup plan. This is not veterinary advice.
Profile data confidence: medium. Driven by the lower-confidence profile (Golden Wonder Killifish): Typical care sources — real tanks still vary.