B Viability counts of V. natriegens prey before (0 h) and after (4 h) co-incubation with wild type V. natriegens attackers harboring the indicated plasmids, on media containing 3% NaCl at 30 °C. Data information: data are shown as the mean ± SD, n = 3 technical replicates; statistical significance between samples at the 4 h timepoint by an unpaired, two-tailed Student's t-test is denoted above and is color coded to match the relevant samples. A significant difference was considered as P < 0.05. 