Fig. 4

a Proportion of Ca. D. californiensis reads in microbiomes from different organs of seven D. fulva nudibranchs and related water samples estimated by 16S rDNA amplicon sequencing and qPCR. b Bacteria (ASVs) of the core mantle microbiome, as defined by different proportion thresholds. The figure shows a subset of the core mantle microbiome ASVs, constituting > 0.1% of the total microbiome. The full version of the core mantle microbiome is shown in Supplementary Fig. S9. Shades of green indicate the number of D. fulva specimens having a proportion of the listed ASV above the given threshold. c Heatmap visualizing the relative abundances of the ASVs from D. fulva core mantle microbiome shown in panel b in different samples from the seven D. fulva specimens and associated water samples. d PCA plot showing ordination of all samples, details are in Supplementary Fig. S10