West Papua Rainbowfish

Melanotaenia fasinensis

West Papua Rainbowfish is a peaceful middle-to-top swimmer.

PeacefulMiddle to top swimmerBeginner – Intermediate

Save this fish or add it directly to one of your aquariums.

Quick facts

Adult size
≤ 12 cm (≤ 4.7 in)
Care level
Beginner – Intermediate
Temperament
Peaceful
Swimming zone
Middle to top swimmer
Temperature
26–30 °C
pH
6.5–8
GH
10–20 dGH
Diet
Omnivore
Lifespan
up to 8 years

Care requirements

Care level: Beginner – Intermediate.

Because it uses the middle to upper part of the aquarium, leave enough open swimming space instead of crowding that part of the aquarium.

The listed lifespan is up to 8 years.

Water parameters

The temperature range for this fish is 26–30 °C, which fits many tropical freshwater aquariums. Choose other fish with overlapping temperature needs.

The pH range for this fish is 6.5–8. That points to a broad freshwater range, but stability is more important than sudden corrections.

The GH range for this fish is 10–20 dGH. That gives some flexibility, but sudden changes are usually more stressful than a stable value that is slightly imperfect.

Temperament and compatibility

As a peaceful middle-to-top swimmer, West Papua Rainbowfish is best kept with calm species that will not harass it or dominate the feeding area.

Because this fish uses the middle to upper part of the aquarium, compatibility is easier when other fish are not all competing for the same swimming space.

Swimming zone and behavior

This fish uses the middle to upper part of the aquarium, so leave enough open swimming space for movement and feeding.

Feeding

As an omnivore, West Papua Rainbowfish should receive a varied diet rather than one repeated food type.

Before adding this fish

  • Choose other fish with overlapping temperature needs.
  • Keep pH stable within the listed range instead of making sudden corrections.
  • Avoid aggressive or highly competitive fish.
  • Offer a varied diet that matches this species.

Similar fish profiles

Use these profiles to compare fish with similar care level, size, temperature range, or swimming behavior.

FAQ

How large does West Papua Rainbowfish get?

West Papua Rainbowfish reaches ≤ 12 cm (≤ 4.7 in). Provide swimming room.

Is West Papua Rainbowfish peaceful?

Yes. West Papua Rainbowfish is recorded as peaceful and is best planned with calm community fish that do not harass it or dominate the feeding area.

What temperature is suitable for West Papua Rainbowfish?

The temperature range for this fish is 26 to 30 °C. Choose other fish with overlapping temperature needs and avoid sudden temperature swings.

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