“…Likewise this study, numerous scientific literatures documented that the inoculation of beneficial bacteria either in water or in feed stimulated growth performance, nutrient digestibility (indicated by low FCR) and survival for different fishes and shrimps such as, Bacillus subtilis increased weight gain and feed utilization for grouper ( Epinephelus coioides ) in 28 day culture ( Liu et al, 2017 ); incorporation of B. cereus and B. thuringiensis enhanced final weight and feed conversion efficiency in Asian seabass, Lates calcarifer ( Ghanei-Motlagh et al, 2021 ); mixture of Bacillus spp., and Lactobacillus spp. improved weight gain and SGR in Nile tilapia ( Oreochromis niloticus ), and carp ( Cirrhinus cirrhosus ) ( Apún-Molina et al, 2009 , Hossain et al, 2022a , Hossain et al, 2022b , Ramos et al, 2017 ); B. coagulans and Rhodpseudomonas palustris together resulted better growth performance and low FCR for Nile tilapia ( Zhou et al, 2010 ); Bacillus sp., Vibrio sp., and Lactobacillus plantarum increased survival along with improved weigh gain and SGR in freshwater shrimp ( Macrobrachium rosenbergii ) ( Mujeeb Rahiman et al, 2010 ); Lactobacillus acidophilus supplement positively reflected in growth and FCR for African catfish, Clarias gariepinus ( Al-Dohail et al, 2011 ); usage of dietary probiotic mixture of B. subtilis , B. megaterium , and B. licheniformis increased the net production, feed conversion, survivability of channel catfish ( Ictalurus punctata ) ( Queiroz and Boyd, 1998 ); yeast ( Saccharomyces cerevisiae ) and Acinobacter ensured better growth and feed utilization in striped catfish, Pangasianodon hypophthalmus and Bighead catfish, Clarias macrocephalus ; respectively ( Boonanuntanasarn et al, 2019 , Bunnoy et al, 2019 ). In general, feed conversion efficiency and wellbeing of fish are reliant on the enzymatic activity, nutrient digestibility and absorption, similarly, better digestion and nutrient assimilation results better performance in growth.…”