Compatibility brief
Can Pea Puffer live with Black phantom tetra?
Caution. Check the issues below before buying.
Pea Puffer + Black phantom tetra: Temperament difference. Pea Puffer is semi-aggressive, while Black phantom tetra is peaceful. This can work with adequate space and hiding spots, but monitor for bullying. Outcomes still depend on your tank shape, maintenance routine, and individual fish.
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).
Pea Puffer is a fin nipper and Black phantom tetra is vulnerable to nipping — long fins are a common target even when water parameters match.
Assessment details
Temperament difference
Top issuePea Puffer is semi-aggressive, while Black phantom tetra is peaceful. This can work with adequate space and hiding spots, but monitor for bullying.
Fin nipping risk
Pea Puffer is a known fin nipper and Black phantom tetra has long, flowing fins. Pea Puffer will likely harass Black phantom tetra.
Compatible temperature range
Both fish can comfortably share similar water temperatures.
“Pea Puffer is semi-aggressive, while Black phantom tetra is…”
Temperament difference
Next steps
Concrete changes, not "research more" filler.
- •Provide plenty of hiding spots and visual breaks so Black phantom tetra can escape if harassed.
- •Avoid keeping Pea Puffer with long-finned fish like Black phantom tetra.
- •Pea Puffer should be kept in a group of at least 6 for best health and behaviour.
- •Black phantom tetra should be kept in a group of at least 6 for best health and behaviour.
Try instead
- →Provide plenty of hiding spots and visual breaks so Black phantom tetra can escape if harassed.
- →Avoid keeping Pea Puffer with long-finned fish like Black phantom tetra.
- →Pea Puffer should be kept in a group of at least 6 for best health and behaviour.
- →Black phantom tetra should be kept in a group of at least 6 for best health and behaviour.
- Seriously Fish. Carinotetraodon travancoricus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Carinotetraodon travancoricus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Carinotetraodon travancoricus
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. Hyphessobrycon megalopterus
Primary: aquarium size, water chemistry, behaviour, and compatibility (URL verified in upgrade script; recheck if site content changes).
- FishBase. Hyphessobrycon megalopterus
Secondary: taxonomy, distribution, and maximum length in nature; cross-check with aquarium import lines and measured tank parameters.
- Wikipedia. Hyphessobrycon megalopterus
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 Pea Puffer + Black phantom 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: high. Based on multiple reputable aquarium care sources with strong agreement.