Why would fish with faulty valves in its conus arteriosus probably suffer from a lack of energy?

Fish with faulty valves in their conus arteriOSus would likely experience reduced circulatory efficiency, leading to inadequate blood flow to vital organs and muscles. This inefficiency can result in insufficient oxygen and nutrient delivery, which are essential for energy production. Consequently, the fish may struggle to maintain normal metabolic functions and exhibit signs of lethargy or reduced activity due to the lack of energy.