Draft Genome Sequence of “ Candidatus Synechococcus spongiarum” m9, Binned from a Metagenome of South China Sea Sponge Theonella swinhoei

" Candidatus Synechococcus spongiarum" represents the widespread cyanobacterial symbionts found in marine sponges with relatively high genomic variability and likely important ecological roles. We present here the draft genome sequence of " Candidatus Synechococcus spongiarum" m9, which was assembled from a metagenome of Theonella swinhoei sampled in the South China Sea.