Dwarf Flathead Gudgeon (Philypnodon macrostomus) 2-4cm

Description

Dwarf Flathead Gudgeon (Philypnodon macrostomus)

Tiny, cryptic and uniquely Australian, the Dwarf Flathead Gudgeon is a fascinating native freshwater fish prized for its compact size, broad head, mottled camouflage and natural ambush-predator behaviour. A smaller relative of the Flathead Gudgeon, Philypnodon macrostomus is an excellent choice for aquarists wanting to explore Australia's lesser-known native freshwater species.

Quick Facts

  • Scientific name: Philypnodon macrostomus
  • Common name: Dwarf Flathead Gudgeon
  • Origin: South-eastern Australia
  • Current size: Approximately 2–4 cm
  • Adult size: Approximately 4–5 cm
  • Tank size: 40L+ recommended
  • Difficulty: 🟑 Moderate
  • Temperament: Generally peaceful but predatory towards very small animals
  • Best kept: Singly, as a pair or in small groups with plenty of bottom structure and cover

Is this for you?

βœ”οΈ Perfect if:

  • You enjoy keeping Australian native freshwater fish.
  • You want a genuinely small gudgeon species.
  • You appreciate natural behaviour and camouflage rather than bright ornamental colours.
  • You are creating a native, creek-style or naturalistic aquarium.

❌ Avoid if:

  • You want a brightly coloured schooling fish.
  • You keep tiny shrimp or fry that you want to breed successfully.
  • Your aquarium has no bottom cover or hiding places.
  • You keep large, aggressive or highly competitive tank mates.

Why choose the Dwarf Flathead Gudgeon?

The Dwarf Flathead Gudgeon is a fantastic example of how interesting Australia's smallest native fishes can be. Its broad head, relatively large mouth and mottled brown-grey colouration allow it to blend beautifully into sand, gravel, leaf litter and submerged timber.

Rather than constantly swimming through open water, these gudgeons spend much of their time close to the substrate, carefully observing their surroundings before darting forward to capture food. Their subtle behaviour becomes increasingly fascinating once you begin watching how they interact with their environment.

At only around 4–5 cm when mature, Philypnodon macrostomus offers much of the character of the larger Flathead Gudgeon in a significantly smaller package, making it particularly interesting for compact Australian native displays.

Benefits

  • Australian native freshwater species
  • Genuinely small adult size
  • Distinctive broad-headed appearance
  • Beautiful natural camouflage
  • Fascinating ambush-feeding behaviour
  • Excellent addition to smaller native Australian aquariums

Care made simple

  • Temperature: Approximately 16–26Β°C
  • pH: Approximately 6.5–8.0
  • Diet: Fine sinking carnivore pellets, frozen daphnia, baby brine shrimp, bloodworms, insect larvae and appropriately sized live foods
  • Water: Clean, stable and well oxygenated
  • Substrate: Fine sand or smooth gravel
  • Setup: Leaf litter, driftwood, smooth rocks, small caves and dense sheltered areas
  • Provide plenty of bottom-level structure where individuals can hide and establish territories.
  • Remember that despite their small size, they are micropredators and may eat fry and very small shrimp.

Pairs perfectly with

  • Pacific Blue-eyes
  • Small Australian Rainbowfish
  • Firetail Gudgeons
  • Other appropriately sized peaceful native fishes
  • Natural aquascapes with leaf litter, rocks and driftwood
NTA Insight:
Don't mistake small for boring. The Dwarf Flathead Gudgeon is essentially a miniature ambush predator, and much of its appeal comes from watching it behave naturally. A shallow-looking aquascape with fine substrate, leaf litter, timber and plenty of small territories allows these tiny native fish to disappear into the environment and suddenly reappear when food arrives.

FAQ

What is the difference between the Flathead Gudgeon and Dwarf Flathead Gudgeon?

The Dwarf Flathead Gudgeon (Philypnodon macrostomus) is considerably smaller than the Flathead Gudgeon (Philypnodon grandiceps). Both share a broad-headed, bottom-dwelling body shape, but the dwarf species is particularly suited to smaller native aquarium displays.

Is the Dwarf Flathead Gudgeon an Australian native?

Yes. Philypnodon macrostomus is an Australian native freshwater species associated with waterways in south-eastern Australia.

Are Dwarf Flathead Gudgeons aggressive?

They are generally peaceful towards appropriately sized tank mates, but they are small predators. Fish fry, tiny crustaceans and other animals small enough to swallow may be eaten.

What should I feed them?

Offer small sinking foods along with frozen or live foods such as daphnia, baby brine shrimp, bloodworms and insect larvae. Some newly introduced individuals may initially show a preference for moving foods.

Can they live with shrimp?

Adult shrimp may sometimes coexist with them, but small shrimp and shrimplets are potential prey. They are therefore not recommended for dedicated shrimp breeding aquariums.

Do they need a heater?

Not necessarily. They tolerate cooler conditions than typical tropical aquarium fish. In many Australian indoor aquariums, additional heating may not be required, provided temperatures remain within a suitable and reasonably stable range.

Can they be kept in groups?

Yes. Small groups can be maintained when there is adequate floor space, structure and visual separation. Providing multiple hiding places reduces competition between individuals.

Can Dwarf Flathead Gudgeons breed in captivity?

Yes. They can reproduce in aquariums when mature fish are provided with appropriate conditions and spawning sites. A separate breeding or grow-out setup will improve the survival of eggs and juveniles.

Dwarf Flathead Gudgeon (Philypnodon macrostomus) 2-4cm

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$15.00


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    Description

    Dwarf Flathead Gudgeon (Philypnodon macrostomus)

    Tiny, cryptic and uniquely Australian, the Dwarf Flathead Gudgeon is a fascinating native freshwater fish prized for its compact size, broad head, mottled camouflage and natural ambush-predator behaviour. A smaller relative of the Flathead Gudgeon, Philypnodon macrostomus is an excellent choice for aquarists wanting to explore Australia's lesser-known native freshwater species.

    Quick Facts

    • Scientific name: Philypnodon macrostomus
    • Common name: Dwarf Flathead Gudgeon
    • Origin: South-eastern Australia
    • Current size: Approximately 2–4 cm
    • Adult size: Approximately 4–5 cm
    • Tank size: 40L+ recommended
    • Difficulty: 🟑 Moderate
    • Temperament: Generally peaceful but predatory towards very small animals
    • Best kept: Singly, as a pair or in small groups with plenty of bottom structure and cover

    Is this for you?

    βœ”οΈ Perfect if:

    • You enjoy keeping Australian native freshwater fish.
    • You want a genuinely small gudgeon species.
    • You appreciate natural behaviour and camouflage rather than bright ornamental colours.
    • You are creating a native, creek-style or naturalistic aquarium.

    ❌ Avoid if:

    • You want a brightly coloured schooling fish.
    • You keep tiny shrimp or fry that you want to breed successfully.
    • Your aquarium has no bottom cover or hiding places.
    • You keep large, aggressive or highly competitive tank mates.

    Why choose the Dwarf Flathead Gudgeon?

    The Dwarf Flathead Gudgeon is a fantastic example of how interesting Australia's smallest native fishes can be. Its broad head, relatively large mouth and mottled brown-grey colouration allow it to blend beautifully into sand, gravel, leaf litter and submerged timber.

    Rather than constantly swimming through open water, these gudgeons spend much of their time close to the substrate, carefully observing their surroundings before darting forward to capture food. Their subtle behaviour becomes increasingly fascinating once you begin watching how they interact with their environment.

    At only around 4–5 cm when mature, Philypnodon macrostomus offers much of the character of the larger Flathead Gudgeon in a significantly smaller package, making it particularly interesting for compact Australian native displays.

    Benefits

    • Australian native freshwater species
    • Genuinely small adult size
    • Distinctive broad-headed appearance
    • Beautiful natural camouflage
    • Fascinating ambush-feeding behaviour
    • Excellent addition to smaller native Australian aquariums

    Care made simple

    • Temperature: Approximately 16–26Β°C
    • pH: Approximately 6.5–8.0
    • Diet: Fine sinking carnivore pellets, frozen daphnia, baby brine shrimp, bloodworms, insect larvae and appropriately sized live foods
    • Water: Clean, stable and well oxygenated
    • Substrate: Fine sand or smooth gravel
    • Setup: Leaf litter, driftwood, smooth rocks, small caves and dense sheltered areas
    • Provide plenty of bottom-level structure where individuals can hide and establish territories.
    • Remember that despite their small size, they are micropredators and may eat fry and very small shrimp.

    Pairs perfectly with

    • Pacific Blue-eyes
    • Small Australian Rainbowfish
    • Firetail Gudgeons
    • Other appropriately sized peaceful native fishes
    • Natural aquascapes with leaf litter, rocks and driftwood
    NTA Insight:
    Don't mistake small for boring. The Dwarf Flathead Gudgeon is essentially a miniature ambush predator, and much of its appeal comes from watching it behave naturally. A shallow-looking aquascape with fine substrate, leaf litter, timber and plenty of small territories allows these tiny native fish to disappear into the environment and suddenly reappear when food arrives.

    FAQ

    What is the difference between the Flathead Gudgeon and Dwarf Flathead Gudgeon?

    The Dwarf Flathead Gudgeon (Philypnodon macrostomus) is considerably smaller than the Flathead Gudgeon (Philypnodon grandiceps). Both share a broad-headed, bottom-dwelling body shape, but the dwarf species is particularly suited to smaller native aquarium displays.

    Is the Dwarf Flathead Gudgeon an Australian native?

    Yes. Philypnodon macrostomus is an Australian native freshwater species associated with waterways in south-eastern Australia.

    Are Dwarf Flathead Gudgeons aggressive?

    They are generally peaceful towards appropriately sized tank mates, but they are small predators. Fish fry, tiny crustaceans and other animals small enough to swallow may be eaten.

    What should I feed them?

    Offer small sinking foods along with frozen or live foods such as daphnia, baby brine shrimp, bloodworms and insect larvae. Some newly introduced individuals may initially show a preference for moving foods.

    Can they live with shrimp?

    Adult shrimp may sometimes coexist with them, but small shrimp and shrimplets are potential prey. They are therefore not recommended for dedicated shrimp breeding aquariums.

    Do they need a heater?

    Not necessarily. They tolerate cooler conditions than typical tropical aquarium fish. In many Australian indoor aquariums, additional heating may not be required, provided temperatures remain within a suitable and reasonably stable range.

    Can they be kept in groups?

    Yes. Small groups can be maintained when there is adequate floor space, structure and visual separation. Providing multiple hiding places reduces competition between individuals.

    Can Dwarf Flathead Gudgeons breed in captivity?

    Yes. They can reproduce in aquariums when mature fish are provided with appropriate conditions and spawning sites. A separate breeding or grow-out setup will improve the survival of eggs and juveniles.

    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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