Orangefin Tetra
Bryconops affinis
A restless, fast-moving shoaler from the Guiana Shield's coastal streams.

About
The Orangefin Tetra (Bryconops affinis) is a perpetually on-the-go fish from the coastal waterways of the Guiana Shield in northern South America, where it thrives in swift-flowing creeks and is most commonly found during low-tide conditions. In the wild it forms active shoals, spending virtually all its time in motion. A behavior it carries directly into the aquarium. This is not a fish that loiters. Keeping a proper group is essential, both for the species' wellbeing and to see its natural schooling behavior on display. In the wild it picks at plant matter and small invertebrates, and in the tank it will accept a varied omnivore diet without much fuss. That said, its constant activity and preference for well-oxygenated water with decent flow means it does best in the hands of a keeper who's thought through their setup carefully rather than a complete beginner. The orange-tipped fins give it a subtle but appealing look that reads better in a group than on a single specimen. At a maximum size approaching nearly five inches, it needs enough horizontal space to stretch its legs, so a roomy tank is a must. If you enjoy watching fish actually swim rather than just hover, this one will keep you entertained.
Similar species
Other fish you might consider
Good tank mates
Species that tend to coexist peacefully with Orangefin Tetra
From the same region
Share the same natural habitat. Great for a biotope-themed tank
Frequently asked questions
- How big does the Orangefin Tetra get?
- The Orangefin Tetra reaches about 3–4.5" as an adult.
- What size tank does the Orangefin Tetra need?
- A minimum of 25 gallons is recommended for the Orangefin Tetra, with more room needed for a proper group.
- What water parameters does the Orangefin Tetra need?
- The Orangefin Tetra does best with a temperature of 72–82°F, a pH of 5.5–7.5, hardness around 10–20 dGH.
- Is the Orangefin Tetra aggressive?
- The Orangefin Tetra is generally peaceful and suits a community tank with similarly calm tankmates.
- What does the Orangefin Tetra eat?
- The Orangefin Tetra is an omnivore. It does well on a varied diet of quality flake or pellet plus occasional frozen or live foods.
- How long does the Orangefin Tetra live?
- With good care, the Orangefin Tetra typically lives 3-5 years.