Compatibility brief
Can Harlequin Rasbora live with Platy?
Often a workable match in a suitable, well-run tank. Still verify behaviour in your setup.
Compatibility score
Profile confidence: high
Order of checkstank volume vs adults → predation mouth gap → temperament / fin nipping → shared water windows.
60L
Combined minimum footprint reference for these two species: about 60L (larger active fish often want more length).
Assessment details
Known compatible pairing
Quiet midwater school meets hardy livebearer. Harlequins hold a tight shoal; platys work the mid-to-surface band without chasing them. Stock six-plus rasboras so the school does not scatter into the platys' path.
Compatible temperaments
Both Harlequin Rasbora and Platy share a peaceful temperament.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
Next steps
Concrete changes, not "research more" filler.
- •Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.
Try instead
- →Harlequin Rasbora should be kept in a group of at least 6 for best health and behaviour.
- 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.
- Seriously Fish. Xiphophorus maculatus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Xiphophorus maculatus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Xiphophorus maculatus
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Wikipedia. Xiphophorus maculatus (platy)
Encyclopaedia overview; use specialist aquarium sources for your stock's real temperature/pH/footprint needs.
Try this next
Build the full stocking list with Harlequin Rasbora + Platy
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. Checked against several solid care sources that mostly agree.