Description
Black Widow Tetra (Gymnocorymbus thayeri)
The Black Widow Tetra is a sleek and striking freshwater fish, easily identified by its dark, almost black body and vivid red fins, which give it a distinctive, dramatic look. Known for its peaceful nature and schooling behaviour, this small yet captivating fish is a perfect addition to community aquariums, where it can form tight-knit groups and display its beautiful colours.
Care Guide
• Tank Requirements:
• Minimum tank size: 15 gallons (60 litres).
• Temperature: 22–28°C (72–82°F).
• pH: 6.0–7.5.
• Substrate: Fine gravel or sand.
• Decorations: Provide plants, driftwood, and rocks for hiding spots, while ensuring open swimming areas for schooling.
• Diet:
Omnivorous; feed a variety of high-quality flakes, pellets, and frozen or live foods such as brine shrimp, bloodworms, and daphnia.
• Tank Mates:
Ideal companions include peaceful species like other tetras, rasboras, corydoras, and small gouramis. Avoid aggressive or fast-moving fish.
• Care Tips:
• Keep in groups of at least 6–8 to encourage natural schooling behaviour and reduce stress.
• Regular water changes and good filtration are essential for maintaining optimal water quality.
• Dim or moderate lighting helps enhance their black body colour and vibrant fins.
The Black Widow Tetra’s striking appearance and peaceful temperament make it a great choice for aquariums looking to add a touch of elegance and activity, while remaining low-maintenance and easy to care for.