siamese fighting fish at bottom of tank2D and E, we in comparison the expression sample of those genes in albino and wild type pigmented fish and located that only microphthalmia linked transcription factor a mitfa within this region was differentially expressed supplementary fig. S11b, Supplementary Material online. However, the expression of mitfa was also reduced in the attention of the albino fish, which usually shows black pigmentation supplementary fig. S11d, Supplementary Material online. Studying the expression of the mitfa gene, we found a paralog of mitfa, in the attention. The expression of mitfb was higher than that of mitfa in the eye of both albino and wild type fish, and, apparently, mitfb was more highly expressed in eyes of albino than wild type fish supplementary fig.