Moreover, we found that the marker of embryonic erythrocytes, hemoglobin alpha embryonic‐3 (hbae3), was also reduced in the heart and CHT of slc39a10 mutant embryos at 3dpf and 5dpf (Figure 2O and FigureS4, Supporting Information), suggesting that the loss of slc39a10 leads to anemia in zebrafish. This evidence concerns the gene SLC39A10 and anemia (phenotype).