
Black Skirt Tetra - Gymnocorymbus ternetzi
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Black Skirt Tetra (Gymnocorymbus ternetzi) is a classic and hardy community fish known for its deep-bodied shape and flowing black dorsal and anal fins. Its subtle gray-to-black coloration and peaceful nature make it a popular choice for both beginner and seasoned aquarists.
Description:
Common Name: Black Skirt Tetra
Scientific Name: Gymnocorymbus ternetzi
Family: Characidae
Size: 2–2.5 inches
Temperament: Peaceful, mildly active
Difficulty: Easy
Native Region:
South America – Paraguay and Guaporé River basins
Aquarium Setup:
Tank Size: Minimum 15 gallons
Temperature: 72–82°F
pH: 6.0–7.5
Hardness: Soft to moderately hard
Decor: Planted tank with open swimming space and dim lighting
Additional Tips:
• Behavior: Best kept in groups of 6 or more to reduce fin-nipping tendencies
• Tankmates: Peaceful community species like rasboras, corydoras, and small gouramis
• Diet: Omnivorous – accepts flakes, micro pellets, and frozen foods
• Care: Avoid housing with long-finned fish, as they may occasionally nip