Possible, but with meaningful cautions
Serpae Tetras can nip long fins, especially in small groups or cramped tanks.
Practical response: Keep a larger Serpae group with ample swimming room, or choose non-long-finned tankmates.
Serpae Tetra
- Adult size
- 4.5 cm / 1.8 in
- Tank reference
- 70+ L / 18.5+ US gal
- Group
- 8+
- Zone
- mid
- Temperature
- 22–27°C / 71.6–80.6°F
Guppy
- Adult size
- 5 cm / 2 in
- Tank reference
- 40+ L / 10.6+ US gal
- Group
- 3+
- Zone
- top
- Temperature
- 22–28°C / 71.6–82.4°F
Water parameter overlap
Behavior and space
An attractive but assertive tetra; larger groups help diffuse chasing and fin-nipping. A prolific livebearer; plan for fry or single-sex groups and avoid persistent fin-nippers.
A compatibility answer should also consider the actual tank dimensions, number of each fish, filtration, planting and other occupants. Two species can be reasonable together in a long, structured aquarium yet become a poor pairing when compressed into a small footprint.
Common questions
Can Serpae Tetra live with Guppy?
The StockingLab verdict is caution: Serpae Tetras can nip long fins, especially in small groups or cramped tanks.
Do their temperatures overlap?
22–27°C / 71.6–80.6°F shared range.
Should I trust compatibility calculators completely?
No. Individual behavior, sex ratios, breeding condition, aquascape and tank size can change the outcome. Use the result to identify risks, then verify care requirements before purchase.