Ocean microbes reveal hidden teamwork in breaking down stubborn seaweed compounds

Scientists have identified how different marine bacteria collaborate to process fucoidan, a complex molecule produced by brown algae that has long resisted microbial breakdown. Unlike previous assumptions, no single bacterial strain alone can fully degrade the compound. Instead, specialized groups handle distinct parts of its structure—some targeting the core framework, others addressing attached sugar branches. This coordinated effort allows the microbial community to process fucoidan more efficiently than individual bacteria could achieve separately. The findings suggest that the absence of these complementary specialists may slow the natural breakdown of fucoidan in ocean environments. Beyond ecological significance, the discovery could inform strategies for harnessing microbial teams to process large-scale biomass from seaweed and similar materials. The research was supported by the Simons Foundation through the PRIME collaboration and published in *Nature*. The work advances understanding of microbial interactions in marine carbon cycling while opening new avenues for biotechnological applications.