“…The key to biofloc systems is their manipulation of the carbon-nitrogen relationship in the ponds or raceways, stimulating the growth of the microbial community formed by bacteria, phytoplankton, zooplankton, uneaten feed and faeces remains, exoskeletons and other invertebrates (Avnimelech, 2009;De Schryver, Crab, Defoirdt, Boon, & Verstraete, 2008;Samocha et al, 2017), providing an increase in final weight, a higher growth rate and a reduction in feed conversion ratio (FCR) (Avnimelech, 2009;Pérez-Fuentes et al, 2013;Zhao et al, 2012). However, some studies indicate a deficiency in essential amino acids on bioflocs, such as methionine and lysine (Gamboa-Delgado et al, 2017;Valle et al, 2015), and polyunsaturated fatty acids, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) (Ekasari, Crab, & Verstraete, 2010).…”