At the molecular level, aberrant expression of cardiomyopathy markers including vmhc, vmhcl, and nppb were detected, further supporting the cardiomyopathy‐like phenotypes in the Tg(fabp7a‐OE); Tg(cmlc2‐creER) double transgenic fish (Figure 6F). The gene discussed is NPPB; the disease is cardiomyopathy.