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Species profile

Featherfin Tetra

Hemigrammus unilineatus

Common names: Featherfin Tetra, One-Line Tetra, Feather Fin, Featherfin

Recognized speciesTetras
Featherfin Tetra (Hemigrammus unilineatus)

Adult size

Up to 5 cm

Up to 5 cm

Countries of origin

  • See all stock from Brazil
  • See all stock from Ecuador
  • See all stock from French Guiana
  • See all stock from Guyana
  • See all stock from Peru
  • See all stock from Suriname
  • See all stock from Trinidad and Tobago
  • See all stock from Venezuela

Good fit for your tank?

Good fit for

  • A peaceful community tank with similar-sized fish
  • A keeper with room for a proper group of 10 or more

Think carefully if

  • You only want to keep one or two, because this fish needs a group of 6 or more

A silver tetra with a dark line along its side and white-tipped dorsal and anal fins. Keep a group of at least 6 in 87 litres or more.

Appearance and Identification

A silver tetra with a dark line along its side and white-tipped dorsal and anal fins. It is common in nature but rare in the hobby, usually arriving among other imports.

Check the scientific name when buying, as common names vary between sellers and countries.

Mature females are usually rounder in the belly, and males are usually slimmer and often brighter.

Tank Requirements

Suggested filter
About 350–440 litres an hour
Suggested heater
About 75–125 W for this tank
Minimum tank volume
87 litres
Minimum tank length
60 cm
Minimum group size
6
Recommended group size
10
Activity level
Active
Flow preference
Low to moderate
Planting preference
Moderately planted
Lid recommended
Yes
Jumping risk
Moderate

A long tank with open swimming water, plants around the edges and steady filtration suits this fish. A darker substrate and some floating plants usually bring out its colour.

Behaviour and Tankmates

Active and social, and most settled when kept with its own kind.

Keep a group of at least 6, and more if you can. Larger groups are calmer and show better colour and behaviour.

Not territorial, although males may spar and display.

Suits a community of similar-sized, peaceful fish that like the same water. Avoid large predators, which will treat it as food. It may eat baby shrimp.

Check tankmates for this species

Water Parameters

Temperature
23–28 °C
pH
5.5–7.5
GH
1–20
Stability importance
Important

Fairly tolerant of different water, if it is clean and stable.

Parameter caveat
Keep up regular water changes, and acclimatise new fish slowly.

Feeding

Diet types
Omnivore
Feeding frequency
Daily
Preferred foods
  • Small flake or micro pelletsA good staple. Feed small amounts that are eaten within a couple of minutes.
  • Frozen or live daphnia and brine shrimpOffer a few times a week for colour and condition.
  • Small bloodwormA rich treat rather than a daily food.

An omnivore that eats small insects and plant debris. Flake and micro pellets with occasional frozen foods suit it.

Feed small amounts, and remove anything left after a few minutes.

Breeding

Breeding type
Egg Scatterer
Breeding difficulty
Moderate
Parental care
None
Baby foods
  • InfusoriaNeeded for the first days, because most fry are very small.
  • Newly hatched brine shrimpIntroduce as soon as the fry can take it.

An egg scatterer with no parental care. Adults eat eggs and fry, so use a separate tank with fine plants, moss or mesh on the bottom, and remove the adults after spawning. The fry need very small foods at first.

Habitat and Origin

Geographic origin
Brazil, Ecuador, French Guiana, Guyana, Peru, South America, Suriname, Trinidad and Tobago, Venezuela
Natural habitat
Ditch, Lake, River
Aquarium contexts
Planted Aquarium
Audience level
Beginner

Classification

Profile type
Recognized species
Genus
Hemigrammus
Family
Acestrorhamphidae
Species group
Fish, Tetras

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