"Jellyfish blooms" refers to a sudden increase in the population of jellyfish in a particular area. It means that there are a lot more jellyfish than usual, and they are thriving and multiplying. Full definition
Increases in jellyfish blooms also are likely to be part of the process. (scientificamerican.com)
As jellyfish blooms become more frequent, it's important to understand their impacts. (independent.com)
Are a series of jellyfish blooms simply a natural cycle, or are they a dire indication of global warming and increased ocean acidification? (bookpage.com)