Compatibility brief
Can Molly live with Tiger Barb?
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.
80L
Combined minimum footprint reference for these two species: about 80L (larger active fish often want more length).
Temperament gap (peaceful vs semi-aggressive) — can work with space, structure, and careful observation, but not a “drop and forget” mix.
Assessment details
Caution advised
Top issueBarbs are faster and more assertive than mollies. Fancy sailfin mollies take fin nips; short-finned mollies cope better in a proper barb school of eight-plus. Chemistry also pulls apart — mollies like hard water, barbs tolerate softer. Not a beginner mix.
Temperament difference
Tiger Barb is semi-aggressive, while Molly 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.
Narrow pH overlap
These fish can share water but their ideal pH ranges overlap only slightly. Aim to keep pH stable in the shared range.
“Barbs are faster and more assertive than mollies”
Caution advised
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Molly can escape if harassed.
- •Tiger Barb 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 Molly can escape if harassed.
- →Tiger Barb should be kept in a group of at least 8 for best health and behaviour.
- Seriously Fish. Poecilia sphenops
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Poecilia sphenops
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Poecilia sphenops
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. Puntigrus tetrazona
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Puntigrus tetrazona
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Puntigrus tetrazona
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 Molly + Tiger Barb
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.