Overview
Scientific name: Gymnocorymbus ternetzi
Black Widow Tetra is a peaceful schooling freshwater tetra suited for planted and community aquariums. It does best in stable, fully cycled water with peaceful tankmates, plant cover, and a properly sized group when possible.
Black Widow Tetra is live freshwater fish for stable, cycled aquariums. Confirm adult size, temperament, group size, and compatibility before ordering.
Scientific name: Gymnocorymbus ternetzi (Domestic strain)
Category: Freshwater Fish
Type: Tetra
Care notes: Keep in a stable, fully cycled aquarium with compatible tankmates, appropriate food, cover where needed, and steady water conditions. Acclimate slowly on arrival and avoid sudden parameter swings.
Shipping & arrival: Most in-stock livestock generally ships in 1–2 business days when weather, livestock condition, and carrier timing are safe. Open the package promptly, keep lights low, and acclimate before release.
- Type: Freshwater Fish
- Subtype: Tetra
- Adult size: Plan for adult size, not just size at purchase.
- Minimum tank: Best in stable planted or community aquariums with peaceful tankmates.
- Temperament: Peaceful schooling tetra.
- Care level: Best in stable, cycled aquariums with clean water and low stress.
- Temperature: Keep temperature steady and matched to peaceful tropical community fish.
- pH: Stable freshwater parameters matter more than constant correction.
- Diet: Crushed flakes, micro pellets, and occasional small frozen foods.
- Best kept: Groups of 6+ when possible, with plant cover and peaceful community fish.
- Best tankmates: Other peaceful tetras, rasboras, small Corydoras, peaceful community fish, and live plants.
- Avoid with: Aggressive cichlids, large predators, rough fin nippers, and goldfish.
