region (17%) (Fig. 1). Although our analysis does not represent
a random sample of the ocean, it reflects all available time-series
of jellyfish data in the global ocean, including all those used in
the published literature to support the current perception of an
increase in jellyfish. We are aware of a couple of additional
existing datasets, but we were unable to access them. These
missing datasets represent, to the best of our knowledge, less
than 10% of the total datasets analyzed. Thus, this compilation
provides the most comprehensive effort to assess changes in
jellyfish abundance across the ocean.