Blue Paradise Fish (Macropodus opercularis)

Description

Blue Paradise Fish (Macropodus opercularis)

Brilliant blue, incredibly hardy and full of personality, the Blue Paradise Fish is one of the oldest ornamental fish species kept in aquariums. Its vibrant colours, flowing fins and confident nature make it a stunning centrepiece for cool or tropical freshwater aquariums.

Quick Facts

  • Scientific name: Macropodus opercularis
  • Common name: Blue Paradise Fish
  • Adult size: 8–10 cm
  • Tank size: 75L+ recommended
  • Difficulty: 🟒 Easy
  • Temperament: Semi-aggressive
  • Best kept: Individually, compatible pairs or with robust community fish

Is this for you?

βœ”οΈ Perfect if:

  • You want a colourful fish with plenty of personality.
  • You're looking for a hardy species suitable for cooler water.
  • You enjoy keeping classic labyrinth fish.
  • You have a well-planted aquarium with plenty of swimming space.

❌ Avoid if:

  • You keep delicate nano fish or shrimp.
  • You have long-finned fish such as Bettas.
  • Your aquarium is overcrowded.
  • You want a completely peaceful community aquarium.

Why choose Blue Paradise Fish?

The Blue Paradise Fish is a selectively bred colour variety of the Paradise Fish, famous for its vibrant metallic blue body accented by darker vertical barring and flowing fins. Originally one of the first tropical aquarium fish exported to Europe in the 1800s, it remains a favourite thanks to its hardiness and striking appearance.

Unlike many tropical fish, Paradise Fish tolerate a broad range of temperatures and can thrive in both unheated indoor aquariums and heated tropical setups. They possess a specialised labyrinth organ, allowing them to breathe atmospheric air when necessary.

Confident and intelligent, Blue Paradise Fish quickly recognise feeding routines and often interact with their owners. Males may become territorial, particularly during breeding, so providing adequate space and decorations is important.

Benefits

  • Beautiful metallic blue colouration
  • Extremely hardy and adaptable
  • Suitable for cool or tropical aquariums
  • Full of personality
  • Interesting labyrinth fish behaviour
  • Long-lived with proper care

Care made simple

  • Temperature: 18–26Β°C
  • pH: 6.5–8.0
  • Diet: Premium pellets, frozen foods, live foods and occasional vegetable matter
  • Water: Clean, stable and well-filtered
  • Setup: Planted aquarium with driftwood, hiding places and open swimming areas
  • Perform weekly water changes to maintain excellent water quality.

Pairs perfectly with

  • White Cloud Mountain Minnows
  • Rainbowfish
  • Larger Barbs
  • Bristlenose Catfish
  • Weather Loaches (in suitably sized cool-water aquariums)
NTA Insight:
Blue Paradise Fish are often overlooked because of their long history in the aquarium hobby, but they're one of the toughest and most rewarding labyrinth fish available. Their colours intensify dramatically when they're healthy, well-fed and housed in spacious planted aquariums. Mature males are particularly impressive during breeding displays.

FAQ

How big do Blue Paradise Fish grow?

Most adults reach around 8–10 cm in length, making them suitable for medium-sized aquariums.

Are Blue Paradise Fish aggressive?

They are considered semi-aggressive. Males can be territorial, especially towards other Paradise Fish or similar-looking species, but they generally do well with robust community fish in spacious aquariums.

Do Blue Paradise Fish need a heater?

Not always. They tolerate cooler temperatures than most tropical fish and can often be kept in unheated indoor aquariums, depending on your local climate. Stable water temperatures are more important than warm water.

Can they live with Bettas?

No. Both species are territorial labyrinth fish, and keeping them together often results in aggression and stress.

Is the Blue Paradise Fish a different species?

No. It is a selectively bred blue colour variety of the Paradise Fish (Macropodus opercularis), not a separate species.

Blue Paradise Fish (Macropodus opercularis)

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$20.00


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    Description

    Blue Paradise Fish (Macropodus opercularis)

    Brilliant blue, incredibly hardy and full of personality, the Blue Paradise Fish is one of the oldest ornamental fish species kept in aquariums. Its vibrant colours, flowing fins and confident nature make it a stunning centrepiece for cool or tropical freshwater aquariums.

    Quick Facts

    • Scientific name: Macropodus opercularis
    • Common name: Blue Paradise Fish
    • Adult size: 8–10 cm
    • Tank size: 75L+ recommended
    • Difficulty: 🟒 Easy
    • Temperament: Semi-aggressive
    • Best kept: Individually, compatible pairs or with robust community fish

    Is this for you?

    βœ”οΈ Perfect if:

    • You want a colourful fish with plenty of personality.
    • You're looking for a hardy species suitable for cooler water.
    • You enjoy keeping classic labyrinth fish.
    • You have a well-planted aquarium with plenty of swimming space.

    ❌ Avoid if:

    • You keep delicate nano fish or shrimp.
    • You have long-finned fish such as Bettas.
    • Your aquarium is overcrowded.
    • You want a completely peaceful community aquarium.

    Why choose Blue Paradise Fish?

    The Blue Paradise Fish is a selectively bred colour variety of the Paradise Fish, famous for its vibrant metallic blue body accented by darker vertical barring and flowing fins. Originally one of the first tropical aquarium fish exported to Europe in the 1800s, it remains a favourite thanks to its hardiness and striking appearance.

    Unlike many tropical fish, Paradise Fish tolerate a broad range of temperatures and can thrive in both unheated indoor aquariums and heated tropical setups. They possess a specialised labyrinth organ, allowing them to breathe atmospheric air when necessary.

    Confident and intelligent, Blue Paradise Fish quickly recognise feeding routines and often interact with their owners. Males may become territorial, particularly during breeding, so providing adequate space and decorations is important.

    Benefits

    • Beautiful metallic blue colouration
    • Extremely hardy and adaptable
    • Suitable for cool or tropical aquariums
    • Full of personality
    • Interesting labyrinth fish behaviour
    • Long-lived with proper care

    Care made simple

    • Temperature: 18–26Β°C
    • pH: 6.5–8.0
    • Diet: Premium pellets, frozen foods, live foods and occasional vegetable matter
    • Water: Clean, stable and well-filtered
    • Setup: Planted aquarium with driftwood, hiding places and open swimming areas
    • Perform weekly water changes to maintain excellent water quality.

    Pairs perfectly with

    • White Cloud Mountain Minnows
    • Rainbowfish
    • Larger Barbs
    • Bristlenose Catfish
    • Weather Loaches (in suitably sized cool-water aquariums)
    NTA Insight:
    Blue Paradise Fish are often overlooked because of their long history in the aquarium hobby, but they're one of the toughest and most rewarding labyrinth fish available. Their colours intensify dramatically when they're healthy, well-fed and housed in spacious planted aquariums. Mature males are particularly impressive during breeding displays.

    FAQ

    How big do Blue Paradise Fish grow?

    Most adults reach around 8–10 cm in length, making them suitable for medium-sized aquariums.

    Are Blue Paradise Fish aggressive?

    They are considered semi-aggressive. Males can be territorial, especially towards other Paradise Fish or similar-looking species, but they generally do well with robust community fish in spacious aquariums.

    Do Blue Paradise Fish need a heater?

    Not always. They tolerate cooler temperatures than most tropical fish and can often be kept in unheated indoor aquariums, depending on your local climate. Stable water temperatures are more important than warm water.

    Can they live with Bettas?

    No. Both species are territorial labyrinth fish, and keeping them together often results in aggression and stress.

    Is the Blue Paradise Fish a different species?

    No. It is a selectively bred blue colour variety of the Paradise Fish (Macropodus opercularis), not a separate species.

    Live Arrival & Ordering FAQ

    Why do livestock prices sometimes change?

    Unlike manufactured products, fish and shrimp continue to grow and develop over time. Their value changes as they increase in size, develop colour, or become breeding pairs.

    Our prices are based on the current size, quality and availability of each specimen. While pricing often remains stable for around 3–4 months, it may be updated at any time to reflect these changes.

    We always aim to offer healthy, high-quality livestock at fair and competitive prices.

    Do you offer a live arrival guarantee?

    Yes. All livestock is covered by our Live Arrival Guarantee.

    In the rare event of DOA, please contact us promptly with clear photos of the livestock in the original unopened bag.

    Please review our full DOA and store policies before purchase.

    Can you ship to all states in Australia?

    No. Due to state restrictions, we cannot ship livestock or live plants to WA and TAS.

    What should I check before ordering?

    Before placing an order, make sure:

    • Your tank is fully cycled and stable
    • Your aquarium has enough space for the species
    • Your current livestock are compatible in temperament, size, and requirements
    • Your water parameters, habitat, and temperature suit the species
    • You are not adding too many fish at once
    What should I expect when my fish arrives?

    It is normal for fish, shrimp, or snails to look pale, stressed, or less active after shipping.

    This is temporary. Most livestock will settle and regain colour within a few days.

    How long does it take for fish to settle in?

    Most livestock will take 3–7 days to fully adjust to their new environment.

    Should I feed my fish immediately after arrival?

    No. We recommend waiting 24 hours before feeding to allow them to settle.

    If you already have fish in your tank, feeding them before introducing new arrivals can help reduce stress.

    Why do fish sometimes struggle after being added to a tank?

    In most cases, issues are caused by tank conditions, not shipping.

    • Uncycled or unstable tanks
    • Poor water parameters
    • Overstocking
    • Unsuitable tank mates
    What is Nano Tanks Australia’s main tip for new livestock?

    Most livestock losses happen in immature or unstable tanks, not during shipping.

    If your setup is not fully established, the risk to new arrivals is significantly higher.

    Not sure if this fish is right for your setup?

    If you are unsure whether this species suits your setup, contact us before ordering and we’ll help point you in the right direction.

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