Compatibility brief
Can Electric Blue Acara live with Harlequin Rasbora?
Caution. Check the issues below before buying.
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) — needs space, structure, and careful observation, not a “drop and forget” mix.
Assessment details
Temperament difference
Top issueElectric Blue Acara is semi-aggressive, while Harlequin Rasbora is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely.
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.
- 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
Supports: aquarium size, water chemistry, temperament and compatibility (primary care reference).
- FishBase. Trigonostigma heteromorpha
Supports: taxonomy and wild maximum size — translate to tank stocking, not a target number.
- Wikipedia. Trigonostigma heteromorpha
Supports: general species background and common-name orientation only.
Try this next
Build the full stocking list with Electric Blue Acara + Harlequin Rasbora
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: high. Checked against several solid care sources that mostly agree.