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Albino red-finned tuxedo lyretail swordtail male
Albino red-finned black swordtail male
Albino animals can be found throughout the animal kingdom. While mutations in several different genes can result in albinism, the most common mutation occurs in tyrosinase, the enzyme that is required for the synthesis of black pigment (eumelanin). Gene editing has been used to inactivate tyrosinase in Medaka, generating a stable albino strain. Albino (red eyed) swordtails that contain black pigmentation are not uncommon and they likely have a mutation in tyrosinase that only partially reduces enzyme activity. Albino swordtails containing black pigmentation are prone to developing melanoma.
Albino Swordtails and Black Pigmentation
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The bodies of the non-albino parents of this male and its siblings are orange, not red. This is consistent with the hypothesis that there is crosstalk between the melanin and xanthophore synthesis pathways. The melanin synthesis pathway may act to suppress full expression of red pigmentation.
Black marigold hifin male
Orange tuxedo hifin males
Black lyretail hifin female
Ghost hifin swordtails
Red albino male swordtail
These fish (st st r r) do not express the genes for micromelanophore production and red/orange pigmentation.
Black lyretail hifin male