The Widow Tetra is a peaceful, active, and schooling freshwater fish known for its black and white coloration and other vibrant colors from selective breeding or genetics.
Scientific Name
Gymnocorymbus ternetzi
Habitat
Native to rivers and streams of South America, especially Paraguay and Guaporé River basins.
Conservation
Not endangered; commonly bred in aquariums.
Lifespan
3–5 years in captivity.
Fun Fact
Selectively bred versions come in pink, purple, yellow, and even fluorescent colors (GloFish).
Diet
Omnivorous – eats flake, pellets, brine shrimp, daphnia, and small live or frozen food.
Average Size
Up to 2 inches (5 cm).
Location / Placement info
Displayed in the Coastal Reef Exhibit, near the Ocean-View Tunnel
FAQ
What is the lifespan of Widow Tetras?
Widow Tetras live 3–5 years in captivity with good care.
How big do Widow Tetras grow?
They grow up to 2 inches (5 cm) in length.
Are Widow Tetras aggressive?
No, they are peaceful and social but should be kept in groups of 6 or more.
Can Widow Tetras live with other fish?
Yes, they are compatible with peaceful tank mates like other tetras, rasboras, and Cory catfish.
Do Widow Tetras come in different colors?
Yes, selective breeding and genetic modification have produced pink, purple, yellow, and fluorescent color variations.
What should I feed Widow Tetras?
Feed them flake foods, pellets, and occasional live/frozen foods like brine shrimp and daphnia.
What tank size do Widow Tetras need?
At least a 15-20 gallon tank is recommended for a small group.
Can Widow Tetras breed in aquariums?
Yes, under proper water conditions and environment, they can breed in captivity.
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