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[ARRIVED 19-JUL-2025] Opaline Blue gourami Trichogaster trichopterus 5-7cm

Description

Trichogaster trichopterus sumatranus Ladiges, 1933
COMMON NAME: Blue gourami.
DESCRIPTION: A subspecies with a powder blue background colour; as far as can be determined, this is a wild colour mutation. First imported in 1933, it quickly became popular as an aquarium fish. Today it is kept more commonly than most other forms of the species. There are hardly any marks at all on this fish, except for the two body spots, but even these look more or less washed out in adult specimens.

BREEDING FORMS of trichogaster trichopterus.

Several specially bred color forms of T. trichopterys have come into the aquarium trade during the last few decades. In most cases it is not possible to determine whether a particular color form was bred out of the original described form or from the blue subspecies. T. t, sumatranus
These forms should just be given common names and no attempts to taxonomically classify them, as has done in much of the aquarium literature, should be attempted. Designations such as var. variety) or forma (form) should not be used
for such breeding forms, since their origins or derivations are really unknown. The best known of the breeding forms are the gold gourami and the silver gourami.

GOLD GOURAMI

The gold gourami has a golden yellow background colour with either black or reddish brown eyes. Most specimens show a clearly conspicuous marble pattern. It is usually assumed that this breeding form was developed from a xanthistic (yellow-colored) mutation of the originally described form.

SILVER GOURAMI
The silver gourami has a silver background colour. There are some individuals that have a clear marbled pattern and others in which this pattern is only weakly apparent. Nothing is known about the origin of the
first specimens. In contrast to the gold gourami, the silver gourami has not had much distribution in the aquarium trade.

COSBY, OR MARBLED, GOURAMI
The Cosby gourami, or marbled gourami, was probably developed in the United States. The original specimens seem to have been Trichogaster tricbopterus
sumatranus, When they first colour up the
have a few dark blue spots on a powdery light blue background. As
replaced by a dark marbled pattern. These striking marked fish are very popular in the aquarium hobby.

This color form has been designated with all kinds of pseudo-scientific names, such as Trichogaster cosby, "Trichogaster sumatranus, var. cosby," or Trichogaster
sumatranus forma cosby."

Labyrinth Fish Pinter (1984) p86

Picture https://www.thesprucepets.com/blue-gourami-1381023

[ARRIVED 19-JUL-2025] Opaline Blue gourami Trichogaster trichopterus 5-7cm

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    Description

    Trichogaster trichopterus sumatranus Ladiges, 1933
    COMMON NAME: Blue gourami.
    DESCRIPTION: A subspecies with a powder blue background colour; as far as can be determined, this is a wild colour mutation. First imported in 1933, it quickly became popular as an aquarium fish. Today it is kept more commonly than most other forms of the species. There are hardly any marks at all on this fish, except for the two body spots, but even these look more or less washed out in adult specimens.

    BREEDING FORMS of trichogaster trichopterus.

    Several specially bred color forms of T. trichopterys have come into the aquarium trade during the last few decades. In most cases it is not possible to determine whether a particular color form was bred out of the original described form or from the blue subspecies. T. t, sumatranus
    These forms should just be given common names and no attempts to taxonomically classify them, as has done in much of the aquarium literature, should be attempted. Designations such as var. variety) or forma (form) should not be used
    for such breeding forms, since their origins or derivations are really unknown. The best known of the breeding forms are the gold gourami and the silver gourami.

    GOLD GOURAMI

    The gold gourami has a golden yellow background colour with either black or reddish brown eyes. Most specimens show a clearly conspicuous marble pattern. It is usually assumed that this breeding form was developed from a xanthistic (yellow-colored) mutation of the originally described form.

    SILVER GOURAMI
    The silver gourami has a silver background colour. There are some individuals that have a clear marbled pattern and others in which this pattern is only weakly apparent. Nothing is known about the origin of the
    first specimens. In contrast to the gold gourami, the silver gourami has not had much distribution in the aquarium trade.

    COSBY, OR MARBLED, GOURAMI
    The Cosby gourami, or marbled gourami, was probably developed in the United States. The original specimens seem to have been Trichogaster tricbopterus
    sumatranus, When they first colour up the
    have a few dark blue spots on a powdery light blue background. As
    replaced by a dark marbled pattern. These striking marked fish are very popular in the aquarium hobby.

    This color form has been designated with all kinds of pseudo-scientific names, such as Trichogaster cosby, "Trichogaster sumatranus, var. cosby," or Trichogaster
    sumatranus forma cosby."

    Labyrinth Fish Pinter (1984) p86

    Picture https://www.thesprucepets.com/blue-gourami-1381023

    Live Arrival & Ordering FAQ

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    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.

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    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.

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    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?

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    • 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.

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    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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