Compatibility brief
Can Electric Blue Acara live with Harlequin Rasbora?
Caution. Check the issues below before buying.
Electric Blue Acara + Harlequin Rasbora: Temperament difference. Electric Blue Acara is semi-aggressive, while Harlequin Rasbora 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.
150L
Combined minimum footprint reference for these two species: about 150L (larger active fish often want more length).
Electric Blue Acara (18cm adult) may treat small Harlequin Rasbora (~5cm) as food once grown — plan adult sizes, not shop sizes.
Temperament gap (semi-aggressive vs peaceful) — can work with space, structure, and careful observation, but not a “drop and forget” mix.
Assessment details
Temperament difference
Top issueElectric Blue Acara is semi-aggressive, while Harlequin Rasbora is peaceful. This can work with adequate space and hiding spots, but monitor for bullying.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“Electric Blue Acara is semi-aggressive, while Harlequin…”
Temperament difference
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Harlequin Rasbora can escape if harassed.
- •Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.
Try instead
- →Provide plenty of hiding spots and visual breaks so Harlequin Rasbora can escape if harassed.
- →Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.
- Seriously Fish. Andinoacara pulcher
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Andinoacara pulcher
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Andinoacara pulcher
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. Trigonostigma heteromorpha
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Trigonostigma heteromorpha
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Trigonostigma heteromorpha
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 Electric Blue Acara + Harlequin Rasbora
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.