“…With growing interest in the utilization of phytogenic feed additives as an eco-friendly measure to ensure the sustainability of aquaculture, proanthocyanidins have been widely reported as a functional feed additive to exert growth promotion effects and improve the health status of some fish species, including the American eel ( Anguilla rostrata ), common carp ( Cyprinus carpio ), hybrid sturgeon ( Acipenser baeri Brandt ♀ × A. schrenckii Brandt ♂), rainbow trout ( Oncorhynchus mykiss ), and tilapia ( Oreochromis niloticus ) [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. The hypolipidemic effect of proanthocyanidins has attracted much attention for its potential to improve the health of humans [ 1 ] and some fish species, including the American eel, grass carp ( Ctenopharyngodon idella ), and tilapia [ 3 , 4 , 10 , 11 ]. At present, the proanthocyanidins reported in aquatic animals are mainly from grape seed proanthocyanidins (GSP).…”