Red Rainbowfish

Red Rainbowfish: The Brilliant Beauty of Aquarium Diversity

The red rainbowfish, also known as the salmon-red rainbowfish, is a species of rainbowfish native to Lake Sentani in Indonesia. Belonging to the Melanotaeniidae family, the red rainbowfish is a popular choice among aquarium enthusiasts due to its vibrant coloration and peaceful nature.

We will explore the size, temperature requirements, care, and tank mates for red rainbowfish. Additionally, we will discuss their diet and lifespan, providing you with a comprehensive guide to caring for these beautiful fish. Whether you’re a beginner or an experienced hobbyist, this article will help you create a suitable environment for your red rainbowfish.

Red Rainbowfish Summary

Scientific NameMelanotaenia splendida
Common NameRed Rainbow Fish
Size4-6 inches
Life Expectancy5-8 years
Different ColorsVibrant red hues
DietOmnivorous, flake/pellets
TemperamentPeaceful, active
Tank Size30+ gallons
Water Hardness (TDS)150-250 ppm
Care LevelModerate
Breeding StyleEgg scatterer
Compatible FishPeaceful community fish
Suitable Tank TypePlanted, spacious
Tank MatesTetras, Corydoras, Gouramis

Overview Of The Red Rainbowfish Species:

  • The Red Rainbowfish, also known as the salmon-red rainbowfish, is a vibrant species of rainbowfish found in Lake Sentani in Irian Jaya, Indonesia. It belongs to the family Melanotaeniidae, specifically the subfamily Melanotaeniinae, which includes the Australian rainbowfishes.
  • This species is highly sought after by aquarium enthusiasts due to its brilliant red coloration and graceful swimming patterns.
  • Red Rainbowfish are known for their peaceful nature and ability to adapt well to captive environments.
  • They are a relatively small species, with adult sizes ranging from 4 to 6 inches in length.
  • These fish have a lifespan of around 5 to 7 years in captivity.
  • Red Rainbowfish are omnivorous and have a varied diet, consuming both small aquatic invertebrates and algae.
  • They prefer a well-maintained freshwater aquarium with plenty of swimming space and hiding spots.

History And Origin Of Red Rainbowfish:

  • Red Rainbowfish is native to Lake Sentani in Irian Jaya, Indonesia.
  • The species was first discovered and described by fish taxonomists in the 1970s.
  • Since then, Red Rainbowfish has gained popularity in the aquarium trade due to its vibrant coloration and peaceful temperament.
  • It is now bred in captivity in various parts of the world, making it more readily available to aquarium hobbyists.

Unique Features And Characteristics Of Red Rainbowfish:

  • The most distinctive feature of the Red Rainbowfish is its vibrant red coloration, which gives it its common name.
  • Males of this species have more intense red hues and display a greater amount of iridescent scales compared to females.
  • The color intensity of these fish can vary depending on their environment, diet, and overall health.
  • Red Rainbowfish have a slender and streamlined body shape, allowing them to move with agility and grace in the water.
  • They have large, translucent fins that are often edged with black or blue accents.
  • These fish are known for their peaceful behavior and can be kept with other non-aggressive species in a community aquarium.
  • Red Rainbowfish are excellent swimmers and can be seen darting around the aquarium, adding a lively and dynamic element to any tank.
Red Rainbow fish

Red Rainbowfish Care And Maintenance

Red Rainbowfish, also known as salmon-red rainbowfish, is a beautiful species native to Lake Sentani in Indonesia. They belong to the Melanotaeniidae family and are known for their vibrant red coloration. These fish are relatively easy to care for and can tolerate a range of water conditions, making them a popular choice among aquarium enthusiasts.

The vibrant and eye-catching Red Rainbowfish is a popular choice among aquarium enthusiasts. With its striking coloration and peaceful nature, this fish adds a lively touch to any freshwater tank. In this section, we will explore the essential care and maintenance requirements for Red Rainbowfish.

Tank Setup And Requirements For Red Rainbowfish:

To provide a conducive environment for your Red Rainbowfish, consider the following tank setup and requirements:

  • Tank size: A spacious tank of at least 30 gallons is recommended to give these active fish plenty of room to swim.
  • Filtration: A reliable filtration system is essential for maintaining good water quality. Aim for a turnover rate of at least 5 to 10 times the tank volume per hour.
  • Water temperature: Keep the water temperature between 72°F and 79°F (22°C to 26°C) to mimic their natural habitat in tropical regions.
  • Decorations: Provide plenty of hiding places and dense vegetation in the aquarium. Use live plants like Java fern or Anubias, and incorporate driftwood and rocks to create hiding spots.
  • Lighting: Red Rainbowfish thrive under moderate lighting conditions. Use a timer to ensure a consistent day-night cycle.
  • Water movement: Mimic natural river currents by adding a gentle water flow. Red Rainbowfish appreciate a slight current in the tank.

Water Parameters And Temperature For Red Rainbowfish:

Maintaining the correct water parameters is crucial for the health and well-being of Red Rainbowfish. Here are the recommended water parameters and temperature:

  • PH level: Keep the pH level between 6.5 and 8.0 to provide a suitable environment for Red Rainbowfish.
  • Water hardness: Aim for a water hardness between 5 and 15 dGH (degrees of General Hardness) to replicate their native habitat.
  • Ammonia and nitrite levels: Ensure that ammonia and nitrite levels are consistently at zero to prevent any harm to your fish.
  • Water changes: Regular water changes of 20-30% every two weeks will help maintain water quality and prevent the buildup of toxins.
  • Temperature stability: Red Rainbowfish are sensitive to temperature fluctuations. Use a reliable aquarium heater to maintain a stable temperature within the recommended range.

Feeding Habits And Diet Of Red Rainbowfish:

Red Rainbowfish are omnivores with a preference for small insects and tiny crustaceans in the wild. Here are some key points about their feeding habits and diet:

  • Diet: Offer a varied diet consisting of high-quality flake or pellet food specially formulated for tropical freshwater fish. Supplement their diet with live or frozen foods like brine shrimp, daphnia, or bloodworms.
  • Feed multiple times a day: Red Rainbowfish have small stomachs and benefit from small meals several times a day. Feed them only what they can consume within a few minutes to prevent overfeeding and water pollution.

Compatible Tank Mates For Red Rainbowfish:

When selecting tank mates for Red Rainbowfish, it’s important to choose peaceful species that share similar water parameters and temperament. Here are some compatible tank mates for Red Rainbowfish:

Avoid adding aggressive or fin-nipping fish, as they can stress or harm the Red Rainbowfish.

Breeding Red Rainbowfish

The Red Rainbowfish, also known as the salmon-red rainbowfish, is a species of rainbowfish from Lake Sentani in Irian Jaya, Indonesia. It belongs to the family Melanotaeniidae and is known for its vibrant red coloration. The Red Rainbowfish is easy to care for and a great addition to any freshwater aquarium.

Lifecycle And Reproductive Behavior Of Red Rainbowfish:

  • Red Rainbowfish have a relatively simple lifecycle, consisting of eggs, fry, and adult fish.
  • In terms of reproductive behavior, male Red Rainbowfish are known for their impressive displays to attract females.
  • During courtship, males will display vibrant colors and fin movements to impress females.
  • Once the female is ready to spawn, she will lay hundreds of eggs, which the male will then fertilize.
  • The eggs are usually adhesive and will attach to plants or other surfaces, where they will hatch within a week.
  • Red Rainbowfish reach sexual maturity at around six months to one year of age.

Setting Up A Breeding Tank For Red Rainbowfish:

  • To successfully breed Red Rainbowfish, it is recommended to set up a dedicated breeding tank.
  • The breeding tank should be spacious enough to house multiple males and females comfortably.
  • Use a gentle filtration system to maintain water quality without creating too much water movement.
  • Ensure the tank has ample hiding spots for the females to retreat to when they are ready to lay eggs.
  • Use live plants, such as Java moss or Vallisneria, to provide additional hiding places and mimic their natural habitat.
  • Maintain consistent water temperature and parameters suitable for breeding, typically around 77-82°F (25-28°C).
  • Provide a balanced diet of high-quality flakes, pellets, and live or frozen foods to enhance their reproductive health.

Tips And Techniques For Successful Breeding Of Red Rainbowfish:

  • Keep a male-to-female ratio of at least 2: 1 to prevent excessive aggression between males.
  • Mimic natural lighting conditions by providing a gradual increase in both light intensity and duration.
  • Condition the breeding pairs with nutritious foods, such as brine shrimp or blackworms, to promote spawning.
  • Monitor water quality regularly and perform frequent partial water changes to maintain optimal conditions.
  • Use a breeding mop or mesh breeding trap to collect the eggs and protect them from being eaten by the adults.
  • After collecting the eggs, place them in a separate hatching tank with gentle aeration and proper water conditions.
  • Feed newly hatched fry with infusoria or commercially available liquid fry food until they are large enough to consume crushed flakes or baby brine shrimp.

Care Of Red Rainbowfish Fry:

  • After hatching, Red Rainbowfish fry are relatively self-sufficient and will start swimming and feeding on their own.
  • Provide a well-balanced diet suitable for their size, consisting of finely crushed flakes, baby brine shrimp, or micro worms.
  • Maintain excellent water quality in the fry tank by performing partial water changes and regular filtration maintenance.
  • Avoid overcrowding the tank to prevent competition for food and potential aggression among the fry.
  • As the fry grow, gradually introduce them to larger food particles and expand their diet to include finely chopped live or frozen foods.
  • Monitor the fry’s growth and overall health, adjusting their diet and water conditions as needed.
  • Gradually acclimate the fry to a larger tank with suitable tank mates once they have reached a suitable size.

Remember, breeding Red Rainbowfish requires patience and attention to detail. By providing the right conditions and care, you can enjoy the beauty of their vibrant colors and witness the growth of their offspring.


The Red Rainbowfish, also known as the salmon-red or New Guinea rainbowfish, is a popular choice for aquarium enthusiasts. This vibrant and colorful species hails from Lake Sentani in Irian Jaya, Indonesia. Belonging to the family Melanotaeniidae, the Red Rainbowfish is a member of the Australian rainbowfishes group.

In terms of care, they are relatively easy to maintain as they are hardy, peaceful, and can tolerate a wide range of water conditions. These omnivorous fish thrive best when kept in schools of six or more in a tank that closely resembles their natural habitat.

As an added benefit, Red Rainbowfish are not only visually stunning but also bring a sense of tranquility to any aquatic setup. Whether you are a seasoned aquarist or a beginner, the Red Rainbowfish is a fantastic choice for adding a splash of color and vibrancy to your aquarium.

So why wait? Dive into the world of Red Rainbowfish and create a captivating underwater oasis today!

Frequently Asked Questions Of Red Rainbowfish

What Is The Lifespan Of A Red Rainbow Fish?

The lifespan of a red rainbow fish is typically around 5 to 7 years.

What Temperature Do Red Rainbow Fish Like?

Red rainbow fish prefer a temperature that ranges between 75-82°F for their optimal health and well-being.

Are Rainbow Fish Hard To Keep?

Rainbow fish are easy to keep because they are hardy, peaceful, and can tolerate a range of water conditions. They thrive in schools of six or more and should be housed in a tank that mimics their natural environment.

What Is The Size Of A Red Rainbowfish?

The size of a red rainbowfish can vary, but on average, they grow to be around 4-5 inches in length. However, some individuals can reach up to 6 inches in size.



International Federation of Online Clubs and Aquatic Societies (IFOCAS)

Federation of British Aquatic Societies (FBAS)

Northeast Council of Aquarium Societies (NEC)

Federation of American Aquarium Societies (FAAS)



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