Rooted neighbor-joining phylogenetic tree based on 16S rRNA gene sequences retrieved from the clone library of the sponge <i>C</i>. <i>cavernosa</i> (green), <i>H</i>. <i>pigmentifera</i> (purple) and reef water (red).

<p>The numbers at the nodes are percentages indicating the levels of bootstrap support based on a neighbor joining analysis of 1,000 resampled data sets. Scale bar represents 10% estimated sequence divergence. <i>Sulfolobus acidocaldarius</i> was used as an out group. Numbers in bracket indicates the additional clones of the same OTU present in the library.