With atmospheric CO2 concentrations increasing, it is vital to improve our understanding of the processes that sequester carbon, the most important being the biological pump of the world's oceans. Jellyfish might not spring to mind as major players in the global carbon cycle but the evidence of large jelly-falls on the world's deep seabeds suggests that gelatinous zooplankton have a greater role in the biological pump than we thought previously. Jellyfish blooms may be increasing and dead jellyfish may offer a rapidly accessible food source as they sink. We have developed a model to explore the remineralization of gelatinous carcasses as they sink, which is allowing us to predict the effects of jelly-falls on carbon transfer around the world.

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