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Species feeding lower at the food web like cyprinids (carp) are often advocated for sustainable aquaculture. However, their gastrointestinal biology (lack of stomach) has limited their acid‐peptic digestion, acid lysis of plants and invertebrate tissues, and phosphorus uptake. This review presents data from 118 articles on the use of plant‐based feed additives (PFAs) in Cyprinus carpio (common carp). Our review shows that most PFA research in carp is focused on improving feed and nutrient utilization efficiency along various levels (in vivo digestibility, metabolizability to in situ nutrient loading), while other half is focused on ensuring animal welfare standards (biomass, immunity, welfare). Several reviewed plant‐based additives however tend to do both. The PFAs include essential oils (EOs), plant‐part extracts (PPEs), medicinal plants (herbs) and spices. The effective inclusion rate of EOs is lower (0.5%–0.75 …