Compatibility brief
Can Betta live with Columbian Tetra?
Risky. This mix is commonly discouraged for typical setups.
Betta + Columbian Tetra: Known incompatible pairing. Columbian tetras are robust fin-nippers and will pursue the trailing fins of a betta until it stops moving. Not a working community pairing in any tank size. Real tanks add variables Fishori cannot model; treat this as a high-risk read, not certainty.
Compatibility score
Profile confidence: low
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).
Columbian Tetra is a fin nipper and Betta is vulnerable to nipping — long fins are a common target even when water parameters match.
Assessment details
Known incompatible pairing
Top issueColumbian tetras are robust fin-nippers and will pursue the trailing fins of a betta until it stops moving. Not a working community pairing in any tank size.
Temperament difference
Betta is semi-aggressive, while Columbian Tetra is peaceful. This can work with adequate space and hiding spots, but monitor for bullying.
Fin nipping risk
Columbian Tetra is a known fin nipper and Betta has long, flowing fins. Columbian Tetra will likely harass Betta.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“Columbian tetras are robust fin-nippers and will pursue the…”
Known incompatible pairing
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Columbian Tetra can escape if harassed.
- •Avoid keeping Columbian Tetra with long-finned fish like Betta.
- •Columbian Tetra 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 Columbian Tetra can escape if harassed.
- →Avoid keeping Columbian Tetra with long-finned fish like Betta.
- →Columbian Tetra should be kept in a group of at least 8 for best health and behaviour.
- Seriously Fish. Betta splendens
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Betta splendens
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Betta splendens
Secondary: general species context; verify all husbandry numbers against a dedicated aquarium care sheet and your test kit, not a single table row.
- Wikipedia. Betta splendens
Encyclopaedia overview; use specialist aquarium sources for your stock's real temperature/pH/footprint needs.
- Seriously Fish. Hyphessobrycon columbianus
Primary: species page covering Colombian range, water chemistry preferences, and the documented fin-nipping under-stocking issue.
- Practical Fishkeeping. Columbian Tetra Profile
Secondary: editor coverage of the species' robust size, schooling needs, and the betta-incompatibility warning.
Try this next
Build the full stocking list with Betta + Columbian Tetra
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: medium. Driven by the lower-confidence profile (Columbian Tetra): Based on typical aquarium care sources; details may vary between setups.