The Black Widow tetra is easily recognisable by its distinctive black dorsal and anal fins. A number of different colour morphs have been bred, along with longfin varieties. (In some pet shops you can find artificially dyed Widow tetras (we will never sell these and do not advise anyone buy them).
Species – Black Widow Tetra - Gymnocorymbus Ternetzi
Current Size – 2cm – 3cm
Adult Length – 5cm
Temperature Range – 20 - 26°C
pH Range – 6.0 – 8.0
Special Requirements - It is best to provide your Tetra with a mixed environment with some open swimming space and some plant cover.
Tanks Mates and Compatibility – One of the better tetras for the ‘general’ community tank. The black widow is both peaceful and lively, and its subdued patterning makes a good contrast to more colourful species. It can be kept with most livebearers, danios, rasboras, other tetras and peaceful bottom dwellers such as Corydoras or smaller Loricariids. It also makes a suitable companion for more robust dwarf cichlids such as kribensis, and due to its somewhat rounded shape is unlikely to end up on the menu if combined with larger species such as angel fish.
Ideal Number to Keep – Mid-level feeders, they are best kept in schools of six or more, for the shoaling effect when they move around the tank. They shoal naturally in the wild and are thus more brightly coloured and more active when kept as a shoal as opposed to singly.
Feeding – A most unfussy, omnivorous species. Flakes and granules, along with regular feedings of small live and frozen foods such as Daphnia and bloodworm are recommended.
Please note – Some images used are library photos and will show the colour potential at a fully mature size, as our fish are juveniles they may vary.
We always aim to supply the fish as close to the purchase size as possible. On rare occasions if this is not possible we will contact you.
The fish are selected at random however you are welcome to make a note on the order and the fish manager will do his best for you, requests are dependent on stock at the time of your order.