Black Skirt Tetra - Gymnocorymbus ternetzi

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