“…Recently, probiotics are used worldwide in eco-friendly and sustainable aquaculture practices, and their application are getting more and more attention due to their positive impact towards growth and/or health benefits of aquatic animals (Chauhan & Singh, 2018;Hai, 2015;Nayak, 2010). Bacillus strains possess growth-promoting potential, and evidence from previous studies have demonstrated that Bacillus bacteria served as probiotics and had a positive impact on the growth of aquatic animals, e.g., Nile tilapia (Oreochromis niloticus; Liu, Wang, et al, 2017), red sea bream (Pagrus major; Zaineldin et al, 2018), sea cucumber (Apostichopus japonicas; Yang, Tian, Dong, Peng, & Wang, 2015) and whiteleg shrimp (Litopenaeus vannamei; Sadat, Adorian, Ghafari, & Hoseinifar, 2018).…”