Jellyfish appear to be on the rise and Sea Around Us Project members Deng Palomares and Daniel Pauly have recently published two studies in the journal Hydrobiologia that help lay the foundation for future jellyfish research. The first paper, co-authored with several other colleagues, provides an overview on the general aspects and shortcomings of jellyfish coverage in the online databases available to ecosystem modelers (i.e. Fishbase, Sealifebase, and Ecopath with Ecosim). The second study looks at the growth of jellyfish and concludes that jellyfish grow at a similar rate to small fishes. Their broad predictions on jellyfish growth might also assist in determining how specific, unstudied species might grow.