Mangrove wetlands are important coastal ecosystems with an outsized effect on carbon cycling. Sediment microbes process much of the carbon in these “blue carbon sinks,” but due to limitations in short-read sequencing, these unique microbiomes are poorly understood. So, a recent study employed a hybrid HiSeq-PacBio approach, which combines the accuracy of short-reads with the contiguousness of long-reads. Compared to short-reads alone, this approach yielded more contiguous MAGs, double the high-quality MAGs, and several novel MAGs. Functional analysis suggested that prokaryotes play an essential role in carbon cycling and that fungi are also important. Prokaryotes displayed potentially versatile metabolic potential for fermentation, autotrophy, organic carbon degradation, and carbon fixation, while fungal functions likely included degradation of various carbon and peptide substrates. The data also revealed a ubiquitous novel candidate bacteria phylum that is potentially capable of anaerobic fermentation and carbon fixation. This study both expanded our understanding of mangrove sediment microbes and highlighted the utility of a hybrid HiSeq-PacBio assembly.