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Compatibility

Compatibility brief

Can Corydoras Catfish live with Golden Wonder Killifish?

Corydoras Catfish

Corydoras Catfish

Corydoras spp. (page covers the common trade group)

peaceful~6cm
Golden Wonder Killifish

Golden Wonder Killifish

Aplocheilus lineatus

semi-aggressive~10cm
VerdictCAUTION

Caution. Check the issues below before buying.

Corydoras Catfish + Golden Wonder Killifish: Caution advised. Different swim zones. The killi hunts the surface; corys work the bottom and stay out of mouth range. No competition for food if the killi gets surface feeds and the corys get sinking pellets. Outcomes still depend on your tank shape, maintenance routine, and individual fish.

Compatibility score

72/100

Profile confidence: low

Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.

Min tank

80L

Combined minimum footprint reference for these two species: about 80L (larger active fish often want more length).

Temperature
Range in °C22–26°C shared
Corydoras CatfishGolden Wonder KillifishShared window
pH
Range6–7.5 shared
Corydoras CatfishGolden Wonder KillifishShared window
Temperament / behaviour

Temperament gap (peaceful vs semi-aggressive) — needs space, structure, and careful observation, not a “drop and forget” mix.

Assessment details

  1. Caution advised

    Top issue

    Different swim zones. The killi hunts the surface; corys work the bottom and stay out of mouth range. No competition for food if the killi gets surface feeds and the corys get sinking pellets.

  2. Temperament difference

    Golden Wonder Killifish is semi-aggressive, while Corydoras Catfish is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely.

  3. Compatible temperature range

    Both fish can comfortably share similar water temperatures.

“Caution advised”

Caution advised

Next steps

Concrete changes, not "research more" filler.

  • •Provide plenty of hiding spots and visual breaks so Corydoras Catfish can escape if harassed.
  • •Corydoras Catfish should be kept in a group of at least 6 for best health and behaviour.
Sources from both profiles
Only URLs that exist on the species records are shown. We do not fabricate citations.

Try this next

Build the full stocking list with Corydoras Catfish + Golden Wonder Killifish

Compare another pairOpen tank builder

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 — trade names for this fish get mixed up, so verify the ID before you buy.

Full tank-mate guides

Related pair checks

Other tank mates for Corydoras Catfish

Corydoras Catfish + Golden Wonder Killifish — common questions

Can Corydoras Catfish live with Golden Wonder Killifish?
Yes, if you plan for it. The verdict is CAUTION, which means the pairing works when specific conditions are met, not by default. The first condition: Provide plenty of hiding spots and visual breaks so Corydoras Catfish can escape if harassed.
What tank size do you need for Corydoras Catfish and Golden Wonder Killifish together?
Plan around 80 litres as the working minimum. That figure comes from each species' published minimum and their group needs, and it assumes adult sizes, not shop sizes.
What's the main risk?
Temperament difference. That is the first thing to plan around. The matching entry under assessment details on this page explains the reasoning and the numbers behind it.
What should you check before buying?
Corydoras Catfish should be kept in a group of at least 6 for best health and behaviour.