Poor pairing in a typical community
A known fin-nipping tendency conflicts with a long-finned or slow tankmate.
Practical response: Choose faster, short-finned tankmates or separate the species.
Black Skirt Tetra
- Adult size
- 6 cm / 2.4 in
- Tank reference
- 75+ L / 19.8+ US gal
- Group
- 6+
- Zone
- mid
- Temperature
- 20–27°C / 68–80.6°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
A robust schooling tetra that can nip slow or long-finned tankmates when under-grouped. 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 Black Skirt Tetra live with Guppy?
The StockingLab verdict is avoid: A known fin-nipping tendency conflicts with a long-finned or slow tankmate.
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.