Compatibility brief
Can Congo Tetra live with Opaline gourami?
Caution. Check the issues below before buying.
Congo Tetra + Opaline gourami: Temperament difference. Opaline gourami is semi-aggressive, while Congo Tetra is peaceful. This can work with adequate space and hiding spots, but monitor for bullying. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
Compatibility score
Profile confidence: medium
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
180L
Combined minimum footprint reference for these two species: about 180L (larger active fish often want more length).
Opaline gourami is a fin nipper and Congo Tetra is vulnerable to nipping — long fins are a common target even when water parameters match.
Assessment details
Temperament difference
Top issueOpaline gourami is semi-aggressive, while Congo Tetra is peaceful. This can work with adequate space and hiding spots, but monitor for bullying.
Fin nipping risk
Opaline gourami is a known fin nipper and Congo Tetra has long, flowing fins. Opaline gourami will likely harass Congo Tetra.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“Opaline gourami is semi-aggressive, while Congo Tetra is peaceful”
Temperament difference
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Congo Tetra can escape if harassed.
- •Avoid keeping Opaline gourami with long-finned fish like Congo Tetra.
- •Congo Tetra should be kept in a group of at least 8 for best health and behaviour.
Try instead
- →Provide plenty of hiding spots and visual breaks so Congo Tetra can escape if harassed.
- →Avoid keeping Opaline gourami with long-finned fish like Congo Tetra.
- →Congo Tetra should be kept in a group of at least 8 for best health and behaviour.
- Seriously Fish. Phenacogrammus interruptus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Phenacogrammus interruptus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Phenacogrammus interruptus
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Seriously Fish. Trichopodus trichopterus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Trichopodus trichopterus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Trichopodus trichopterus
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
Try this next
Build the full stocking list with Congo Tetra + Opaline gourami
Plan further
Try both species in the full-stock tank check, or open either fish profile for mates lists. 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: high. Based on multiple reputable aquarium care sources with strong agreement.