Dwarf Neon Rainbowfish – Melanotaenia praecox

The Dwarf Neon Rainbowfish or Melanotaenia praecox is a beautiful small peaceful fish that can be found in the Mamberamo river system Western Papua New Guinea. Praecox Rainbow can reach a size of 2 inches (6cm) and have a sliver bluish body with red fins. The Dwarf Neon Rainbowfish male will grow larger than females and have a more colorful and deeper body.

Neon Rainbowfish   do their best in planted aquarium with lots of swimming space and should be kept in school of 6 or more. The male tends to display better colors in groups. The aquarium should have a pH around 6.5 to 7.0 and a water temperature of around 73-82 degrees °F.

Dwarf Neon Rainbowfish   is an omnivore and should be fed a varied diet like live insects, Brine shrimp, frozen food, blackworms, high quality flakes and small fish pellets.

Breeding Dwarf Neon Rainbowfish   is very easy they are egg layers and will readily spawn in the aquarium. Just place a spawning mops or java moss in the aquarium after spawning remove the spawning mops or java moss to collect eggs. Place them in a 5 or 10 gallon tank with a temperature of 75-80 degrees °F and the eggs should hatch around 7-10 days. Once eggs hatch you can feed fry micro worms or vinegar eels and after 5-7 days you can start feeding them newly hatched brine shrimp.


Dwarf Neon Rainbowfish

  • Scientific Name: Melanotaenia praecox
  • Family: Melanotaeniidae
  • Range: Western New Guinea, Mamberamo river system in northern Irian Jaya, Farm raised
  • Maximum Size: 2 inches (6cm)
  • Aquarium Size: Small tank 20 gallon or lager
  • Behavior: Peaceful
  • Temperature: 73-82°F (23-28°C)
  • PH: 6.5 to 7.0
  • Carbonate Hardness: 5-15 Dkh
  • Care Level: Easy
  • Feeding: Omnivore, Flake food, Freeze dried bloodworms or live food
  • Life Span: 5  years
  • Reproduction: Egg layers
  • Common Name: Dwarf Neon Rainbowfish, Praecox Rainbow, Melanotaenia praecox




Here are some other Rainbowfish species:
Threadfin Rainbowfish ( Iriatherina werneri )
Turquoise Rainbowfish ( Melanotaenia lacustris)
Red Irian Rainbowfish  ( Glossolepis incisis )
Boesemani Rainbowfish ( Melanotaenia boesemani )

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