“…In aquatic studies, propolis and HBP were investigated to support growth and immunity. Growth performance and immune response were improved by dietary propolis in Nile tilapia ( Oreochromis niloticus ) (Hassaan, Nagar, Salim, Fitzsimmons, & El‐Haroun, 2019; Meurer, Matiuzzi da Costa, De Barros, Leal de Oliveira, & Da Paixão, 2009), rainbow trout ( Oncorhynchus mykiss ) (Deng et al., 2011; Tuna Keleştemur & Seven, 2013), Mozambique tilapia ( Oreochromis mossambicus ) (Acar, 2018), eel ( Anguilla japonica ) (Bae, Park, Lee, Okorie, & Bai, 2012), Chinese sucker ( Myxocyprinus asiaticus ) (Zhang, Gong, Yu, & Yuan, 2009) and European bass ( Dicentrarchus labrax ) (Šegvić‐Bubić et al, 2013) (see review (de la Cruz‐Cervantes, Benavides‐González, Sánchez‐Martínez, Vázquez‐Sauceda, & Ruiz‐Uribe, 2018)). However, there are only a few studies focusing on the effects of dietary HBP on fish physiology.…”