Black Widow Tetra
Behaviour Peaceful but may nip long-finned fish
Typical size 4cm
Max size 6cm
Tank Area Middle, top
Min Tank Size 60cm
Min Number 5
Temp Min: 20℃ Max: 26℃
Feeding Flake, frozen, live foods
pH Range 5.5-8.5
Hardness vs,s,m,h,vh
Black Widow Tetra Gymnocorymbus ternetzi
  • Black Widow Tetra Gymnocorymbus ternetzi - thumbnail
  • Black Widow Tetra Gymnocorymbus ternetzi - thumbnail

Black Widow Tetra

Gymnocorymbus ternetzi

The Black Widow Tetra is a peaceful shoaling fish, which is very hardy and suited to a wide range of water conditions. After around a year, the black colour begins to fade to a washed out grey appearance and the fish no longer shoals, preferring its own space. Although very peaceful, the Black Widow Tetra will nip at long finned fish such as Guppies or Siamese Fighting Fish. Keep in aquariums with some hiding spots amongst plants. A good aquarium fish.

Family Characidae (Characins) | Synonyms Tetragonopterus ternetzi, Gymnocothymbus ternetzii | Other names Black tetra, butterfly tetra | Origin South America; Paraguay and Guapore River basins | Breeding Egg scatterer | Natural Water Conditions pH 6-8, very soft to medium | Sexing Males dorsal fin is pointed and narrow whilst the anal fin is broader.

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