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Jonathan Lynch (University of Hawaii, USA) and colleagues published a preprint on host- and bacterium-based determinants that protect squid-associated Vibrio fischeri from phage predation. They show that mutations in V. fischeri's exopolysaccharide locus render it resistant to infection by phage ϕHNL01, and that during squid colonization, V. fischeri is protected from phage present in ambient seawater.