C Viability counts of V. natriegens prey before (0 h) and after (4 h) co-incubation with the indicated attackers, as described in B, on media containing 3% NaCl at 30 °C. 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. A significant difference was considered as P < 0.05. DL, assay detection limit. 