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Angelfish Genetics Library

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  • Gold Gene

    Gold Gene

    Notation: g
    Gene Category: Recessive

    Single Dose Phenotype: Hidden due to being a recessive gene. Occasionally there may be slight hints of gold coloring in the dorsal. In combination with the Dark gene, it is known to intensify the black pigmentation.

    Double Dose Phenotype: Solid gold angelfish with a lighter belly area. Blocks the development of dark pigments.

    Being a recessive gene, it is rarely known to exist until breeding starts. And, even then if both parents do not possess this gene it continues to go unnoticed.


    Gold Angelfish
    Source: http://www.theangelfishsociety.org/phenotype_library_20...
    See more | Go to post

  • Gold Marble Gene

    Gold Marble Gene

    Notation: Gm
    Gene Category: Dominant

    Single Dose Phenotype: Gold forehead and dorsal areas with the mottled black and white on the rest of the body.

    Double Dose Phenotype: The black marbling increases and often becomes more black than white in patterning.

    Gold Marble Ghost


    Silver Gold Marble
    ...
    See more | Go to post

  • Stripeless Gene

    Stripeless Gene

    Notation: S Gene Category: Incomplete Dominant Single Dose Phenotype: Offspring have broken or no stripes, are known as a Ghost, remain vigorous. Double Dose Phenotype: Offspring have thin gill plate that is translucent instead of reflective which allows the gill coloration to show through. This trait is known as a Blush. Those with a double dose of this gene tend to be weak and have a high mortality rate when compared to the other phenotypes. Males with the Stripeless gene are known to develop a more pronounced kok than is typically see...
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  • Sexing Angelfish

    Sexing Angelfish

    Sexing freshwater angelfish can be very difficult for even the most experienced breeder. There are certain characteristics that tend to occur most often in one sex or the other.

    So, what are the clues? First I must say that the younger the angelfish the more difficult they are to sex. And, if smaller than a quarter, don't even try. When they are that young it is an impossible task.

    Male Female
    Enarged bump on head (kok) Flat head shape that is more like a ski slope
    Deep notch across forehead, between eyes No notch, ski slope shaped
    Dorsal held very erect and straight Dorsal typically held at a slight angle
    ...
    See more | Go to post

  • Smokey Gene

    Smokey Gene

    Notation: Sm Gene Category: Incomplete Dominant Single Dose Phenotype: Back half of the angelfish will have a grey or black smoke appearance Double Dose Phenotype: The smoke appearance will cover more than 50% of the body and will often take on a deeper color Don't confuse a Smokey angel with a Half Black one. Smokeys have a slightly mottled appearance that looks much like smoke billowing about. The smoke can range from several shades of grey to deep brown or charcoal black. There are a wide variety of combinations of Smokey angelfish! If there are no other phenotypes involved the fish looks like a wi...
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  • Marble Gene

    Marble Gene

    Notation: M Gene Category: Incomplete Dominant Alleles: Dark, Gold Marble, Gold Single Dose Phenotype: Evenly distributed mottling between black and white. If there is no gold in the dorsal and if the marbling remains in a stripe like pattern, then the fish is known as a Silver Marble. Double Dose Phenotype: Predominantly black with few white patches. Sometimes confused with a Hybrid Black angel due to it predominant black coloring. Marbling was the first patterning mutation in angelfish. You can tell the difference between a true Marble and a Gold Marble by the ...
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  • Zebra Gene

    Zebra Gene

    Notation: Z Gene Category: Dominant Single Dose Phenotype: Angels with this gene will have at least 3 body stripes, not including the eye stripe or the stripe across the base of the caudal fin. Double Dose Phenotype: While there is no physical characteristic to clue you into an angel being double dose Zebra, all those with double dose grow very slow and are often culled or mistaken for runts. The only way to know positively if a given fish is double dose is to breed it with a wild or silver type angel. If all offspring are Zebras, then this parent would be confirmed to ...
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  • Dark Gene

    Dark Gene

    Notation: D Gene Category: Incomplete Dominant Alleles: Marble, Gold Marble, Gold Single Dose Phenotype: Known as a Black Lace Double Dose Phenotype: Solid black angelfish Discovered in 1953, the Dark gene is sometimes referred to as a lethal gene due to the fact that pure Double Dark angels have a very high mortality rate. For this reason Double Dark angels are crossed to include other genetics that help to improve the vigor of the offspring without interfering with the phenotype of this gene. Smokey Pinoy Angel DD Black Angel ...
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  • Genetic Terminology

    Genetic Terminology

    In order to have a discussion on genetics the following terms may be used. Some can be confusing concepts and may make it difficult to have a meaningful discussion.

    Phenotype: A phenotype is the visible or physical characteristics that are influenced by both the genetic makeup as well as environmental influences. Angelfish phenotypes can be black or blue colored because of their genes; or can be washed out due to being raised under constant light.

    Genotype: The gene pool of the individual specimen. With the many mutations available in the aquarium trade today. A fish can posses a recessive gene that...
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  • Angelfish Genetics

    Angelfish Genetics

    Angelfish have been kept in captivity and bred since the early 1920s. Initially only the wild angels were kept and none of the color variations existed. That is until 30 years later. In the 1950s angelfish genes began to mutate. Why is anyone's guess; but odds are due to inbreeding as well as natural mutation. Genetics can be a mind blowing subject to study. But once you understand the basics behind the concept it actually isn't so mystical.

    In order to have a discussion on genetics, a few terms should be defined. If you are not familiar with terms such as phenotype and genotype, then please review the genetic terminology. Now for the good stuff. Divi...
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    Last edited by catsma_97504; 07-29-2015, 04:55 PM.
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  • Gold Marble Gene
    catsma_97504
    Notation: Gm
    Gene Category: Dominant

    Single Dose Phenotype: Gold forehead and dorsal areas with the mottled black and white on the rest of the body.

    Double Dose Phenotype: The black marbling increases and often becomes more black than white in patterning.

    Gold Marble Ghost


    Silver Gold Marble
    ...
    05-26-2013, 11:14 PM
  • Gold Gene
    catsma_97504
    Notation: g
    Gene Category: Recessive

    Single Dose Phenotype: Hidden due to being a recessive gene. Occasionally there may be slight hints of gold coloring in the dorsal. In combination with the Dark gene, it is known to intensify the black pigmentation.

    Double Dose Phenotype: Solid gold angelfish with a lighter belly area. Blocks the development of dark pigments.

    Being a recessive gene, it is rarely known to exist until breeding starts. And, even then if both parents do not possess this gene it continues to go unnoticed.


    Gold Angelfish
    Source: http://www.theangelfishsociety.org/phenotype_library_20...
    05-26-2013, 11:10 PM
  • Sexing Angelfish
    catsma_97504
    Sexing freshwater angelfish can be very difficult for even the most experienced breeder. There are certain characteristics that tend to occur most often in one sex or the other.

    So, what are the clues? First I must say that the younger the angelfish the more difficult they are to sex. And, if smaller than a quarter, don't even try. When they are that young it is an impossible task.

    Male Female
    Enarged bump on head (kok) Flat head shape that is more like a ski slope
    Deep notch across forehead, between eyes No notch, ski slope shaped
    Dorsal held very erect and straight Dorsal typically held at a slight angle
    ...
    04-04-2013, 08:28 PM
  • Smokey Gene
    catsma_97504
    Notation: Sm Gene Category: Incomplete Dominant Single Dose Phenotype: Back half of the angelfish will have a grey or black smoke appearance Double Dose Phenotype: The smoke appearance will cover more than 50% of the body and will often take on a deeper color Don't confuse a Smokey angel with a Half Black one. Smokeys have a slightly mottled appearance that looks much like smoke billowing about. The smoke can range from several shades of grey to deep brown or charcoal black. There are a wide variety of combinations of Smokey angelfish! If there are no other phenotypes involved the fish looks like a wi...
    03-16-2013, 06:46 PM
  • Zebra Gene
    catsma_97504
    Notation: Z Gene Category: Dominant Single Dose Phenotype: Angels with this gene will have at least 3 body stripes, not including the eye stripe or the stripe across the base of the caudal fin. Double Dose Phenotype: While there is no physical characteristic to clue you into an angel being double dose Zebra, all those with double dose grow very slow and are often culled or mistaken for runts. The only way to know positively if a given fish is double dose is to breed it with a wild or silver type angel. If all offspring are Zebras, then this parent would be confirmed to ...
    03-16-2013, 06:43 PM
  • Stripeless Gene
    catsma_97504
    Notation: S Gene Category: Incomplete Dominant Single Dose Phenotype: Offspring have broken or no stripes, are known as a Ghost, remain vigorous. Double Dose Phenotype: Offspring have thin gill plate that is translucent instead of reflective which allows the gill coloration to show through. This trait is known as a Blush. Those with a double dose of this gene tend to be weak and have a high mortality rate when compared to the other phenotypes. Males with the Stripeless gene are known to develop a more pronounced kok than is typically see...
    03-16-2013, 06:42 PM
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