Black tetra
Gymnocorymbus ternetzi
Characidae
Easy
Parameter dashboard
Temperature
20-26 °C
pH
6-8
Size
7.5 cm
Lifespan
5 years
Min tank60 L
Price$
DietOmnivore
TemperamentPeaceful
OriginSouth America
Shrimp-safeYes
Care guide
Black tetras are peaceful, schooling fish that thrive in well-planted tanks with temperatures between 20-26°C and pH 6.0-8.0. A minimum tank size of 60L is recommended. They are relatively easy to care for.
Tankmate compatibility (sample)
Pairwise screening against other species in the database (prioritizing the same family when data is available).
Review first (3)
Caution or avoid from automated rules — confirm before mixing.
| Species | Assessment | Notes |
|---|---|---|
| Black neon tetra Hyphessobrycon herbertaxelrodi Caution | Caution | Fish 2x+ larger may eat smaller tankmates Open pair in Compare → |
| Black phantom tetra Hyphessobrycon megalopterus Caution | Caution | Fish 2x+ larger may eat smaller tankmates Open pair in Compare → |
| Neon tetra Paracheirodon innesi Caution | Caution | Fish 2x+ larger may eat smaller tankmates Open pair in Compare → |
9 species with compatible assessment in this sampleCollapse to hide the list; use “Open pair in Compare” for the full matrix.
| Species | Assessment | Notes |
|---|---|---|
| Blackline penguinfish Thayeria boehlkei Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Bleeding-heart tetra Hyphessobrycon erythrostigma Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Colombian Tetra Hyphessobrycon columbianus Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Diamond tetra Moenkhausia pittieri Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Glowlight tetra Hemigrammus erythrozonus Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Head-and-taillight tetra Hemigrammus ocellifer Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Lemon tetra Hyphessobrycon pulchripinnis Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Rummy-nose tetra Hemigrammus rhodostomus Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
| Silvertip tetra Hasemania nana Compatible | Compatible | No rule-based conflicts detected for this pair. Open pair in Compare → |
Same rule engine as Compare. Not a substitute for observation, tank size, or acclimation.
Related species
Keep this species? Spot anything off?