Fig. 3. Correlative light and electron microscopy localises phages to host ultrastructure.

Representative micrographs localise symbiont phages to A their bacterial symbiont hosts and B the sponge phagosomes. White boxes indicate the regions that are magnified on the right and arrows denote positions of phage signal. Scale bars 1 µm. For correlation statistics and single channels see Supplementary Fig. S6.