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.