Black Widow Tetra (Gymnocorymbus ternetzi) Fish Species Profile
The Black Widow Tetra is a peaceful, hardy, active and easy to care for fish, they can adapt to a wide variety of different water parameters, making it a popular species to have in an aquarium.
Although they are very peaceful, they may nip at other long-finned species such as Guppies or Betta's so avoid keeping them with those long, flowing fin species.
The Black Widow tetra is easily identified by the distinguishing black anal and dorsal fins, and by the vertical black bars on the body.
|Scientific Name||Gymnocorymbus ternetzi|
|Other Names||Longfin Black Skirt Tetra, Golden Skirt Tetra, Coloured Skirt Tetra|
|Aquarium Level||Bottom - Middle|
|Best kept as||Groups 5+|
|Lifespan||3 - 5 years|
|Maximum Size||up to 7.5 cm|
|Temperature||68 - 78 ℉ (20 - 25.6 ℃)|
|PH||6.0 - 7.0|
|GH||5 - 20|
|KH||10 - 1|
Black Widow Tetras inhabit small, slow-moving creeks, tributaries and streams in Rio Paraguay and Guapore basins in Brazil, Bolivia and Argentina in Brazil, South America.
In their habitat, you will usually find them in dense overhanging vegetation that provides them with both shade and food.
They gather near the water's surface where they will eat crustaceans, small worms and insects.
Black widow tetras will accept virtually any food, including granules, flakes and freeze-dried foods.
Regular, small but often feedings of frozen, and small live foods such as Bloodworm and Daphnia are highly recommended as it provides optimal health and colour.