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Species profile

Banded Rainbowfish

Melanotaenia trifasciata

Common names: Banded Rainbowfish, Striped Sunfish, Three-Banded Sun-Fish

Recognized speciesRainbowfish

Adult size

Up to 15 cm

Up to 15 cm

Countries of origin

  • See all stock from Australia

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
  • You keep shrimp you want to protect

A colourful rainbowfish from northern Australia that varies greatly by locality, with red, gold and blue forms. Keep a group of at least 6 in 108 litres or more.

Appearance and Identification

A colourful rainbowfish from northern Australia that varies greatly by locality, with red, gold and blue forms. Do not mix the forms, because they hybridise freely.

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 220–320 litres an hour
Suggested heater
About 100–150 W for this tank
Minimum tank volume
108 litres
Minimum tank length
120 cm
Minimum group size
6
Recommended group size
10
Activity level
Active
Flow preference
Low
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 is likely to eat shrimp.

Check tankmates for this species

Water Parameters

Temperature
24–33 °C
pH
6.5–8
GH
8–20
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 takes flake, pellets and frozen foods, and benefits from some plant matter.

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

Breeding

Breeding type
Egg Scatterer
Breeding difficulty
Difficult
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
Australia, Oceania
Natural habitat
Freshwater Stream, Lake, River, Swamp
Aquarium contexts
Planted Aquarium
Audience level
Beginner

Classification

Profile type
Recognized species
Genus
Melanotaenia
Family
Melanotaeniidae
Species group
Fish, Rainbowfish

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