Skip to main content
Compatibility

Compatibility brief

Can Harlequin Rasbora live with Tiger Barb?

Harlequin Rasbora

Harlequin Rasbora

Trigonostigma heteromorpha

peaceful~5cm
Tiger Barb

Tiger Barb

Puntigrus tetrazona

semi-aggressive~7cm
VerdictCAUTION

Caution. Check the issues below before buying.

Harlequin Rasbora + Tiger Barb: Temperament difference. Tiger Barb is semi-aggressive, while Harlequin Rasbora is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely. Outcomes still depend on your tank shape, maintenance routine, and individual fish.

Compatibility score

72/100

Profile confidence: medium

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 °C22–27°C shared
Harlequin RasboraTiger BarbShared window
pH
Range6–7.5 shared
Harlequin RasboraTiger BarbShared window
Temperament / behaviour

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

Assessment details

  1. Temperament difference

    Top issue

    Tiger Barb is semi-aggressive, while Harlequin Rasbora is peaceful. Expect chasing or stress unless the tank is large and heavily structured — monitor closely.

  2. Compatible temperature range

    Both fish can comfortably share similar water temperatures.

“Tiger Barb is semi-aggressive, while Harlequin Rasbora is…”

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.
  • •Tiger Barb should be kept in a group of at least 8 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 Harlequin Rasbora + Tiger Barb

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: high. Checked against several solid care sources that mostly agree.

Full tank-mate guides

Related pair checks

Other tank mates for Harlequin Rasbora

Instead of Tiger Barb, consider

Safer companions listed for Harlequin Rasbora. Check each pair individually.

Harlequin Rasbora + Tiger Barb — common questions

Can Harlequin Rasbora live with Tiger Barb?
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 Harlequin Rasbora can escape if harassed.
What tank size do you need for Harlequin Rasbora and Tiger Barb 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?
Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour. Tiger Barb should be kept in a group of at least 8 for best health and behaviour.