Black Skirt Tetra — Fish Profile
Gymnocorymbus ternetzi
Quick Specs
| Adult Size: | 2.5" |
| Temperament: | semi-aggressive |
| Care Level: | beginner |
| Min Tank Size: | 15 gallons |
| Temperature: | 68-79°F |
| pH Range: | 6.0-7.5 |
| Diet: | omnivore |
| Origin: | South America (Paraguay, Argentina) |
| Lifespan: | 3-5 years |
Overview
Black Skirt Tetras are hardy, deep-bodied tetras with distinctive black anal and dorsal fins that resemble a skirt. They can be fin-nippers, especially when kept in small groups. Keep in groups of 6+ to distribute aggression. A great choice for beginners wanting a striking black fish.
Care Guide for Black Skirt Tetra
Tank Setup
Black Skirt Tetra requires a minimum tank size of 15 gallons. Maintain water temperature between 68°F and 79°F, with a pH range of 6.0 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Black Skirt Tetra with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Black Skirt Tetra is a omnivore feeder. Provide a varied diet appropriate for omnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as semi-aggressive. Black Skirt Tetra reaches an adult size of 2.5 inches and has a care level of beginner. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Black Skirt Tetra originates from South America (Paraguay, Argentina) and has an expected lifespan of 3-5 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
Compatibility Results for Black Skirt Tetra
All 69 compatibility checks involving Black Skirt Tetra:
Recommended for Black Skirt Tetra
Aqueon Tropical Flakes — $7.99Tropical flake food for community tetras
Expert Care Tips for Black Skirt Tetra
- Mid-size tank: Black Skirt Tetra needs 15+ gallons. Choose a tank at least 2× as long as the fish's adult size (2.5") for adequate swimming room.
- Cool-water species: Black Skirt Tetra tolerates temperatures as low as 68°F. In most homes, no heater is needed, but watch for summer overheating above 79°F.
- Adaptable pH range: Black Skirt Tetra accepts pH 6.0–7.5. Most tap water falls within this range, but always test and acclimate slowly.
- Semi-aggressive temperament: Black Skirt Tetra is generally peaceful but can become territorial. Provide ample hiding spots and avoid housing with fin-nipping species.
- Acclimation: Always drip-acclimate Black Skirt Tetra over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.