Interestingly, we observed increased transcript levels of the gene encoding alpha‐synuclein (snca), known to be a key player in Parkinson's disease and upregulated in the killifish brain (Matsui et al., 2019), in the aged killifish retina (log2FC = 1.13, p‐value = 1.28E‐10, FDR = 3.51E‐9; Figure 2a). The gene discussed is SNCA; the disease is Parkinson disease.