Photos taken at Wharf Aquatics
© Sean Evans
|Common name:||Black Widow tetra, Black tetra|
|Scientific name:||Gymnocorymbus ternetzi|
|Size:||Around 2" (5cm) or slightly larger.|
|Origin:||South America: Brazil and Paraguay.|
|Tank setup:||A planted tank, with open swimming space.|
|Compatibility:||Generally a peaceful community fish - long-finned varieties may fall victim to fin nippers.
Occasionally known to nip the fins of other fish, but this is not normally a problem when kept as a shoal.|
|Water chemistry:||A wide range tolerated, but soft and slightly acidic (pH 6.0-7.0) prefered.|
|Feeding:||Omnivorous: live, frozen and dry foods.|
|Sexing:||Females are slightly larger with a rounder body. Males may show white spots on the tail fin.|
|Breeding:||Eggs are scattered among fine-leaved plants and hatch in about a day. Being a typical egg scatterer,
the parents will eat the eggs if given the opportunity.|
An undemanding species which is often recommended for the beginner. A number of colour and long-finned
varieties have been produced.