BING, a antimicrobial peptide discovered in Japanese medaka fish (O. laptipes), originates from vacuolar protein sorting-associated protein 13D-like (Vps13D). It exhibits efficacy against a range of Gram-negative and Gram-positive bacteria, notably including methicillin-resistant S. aureus (MRSA; MICs = 4-64 µg/ml). Furthermore, BING enhances the effectiveness of antibiotics such as ampicillin, amoxicillin, and novobiocin against P. aeruginosa, and it prevents resistance development to kanamycin and ampicillin in E. coli. Notably, its administration in vivo significantly improves survival rates in O. laptipes challenged with E. tarda.