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Jellyfish galaxies are an excellent tool to investigate the short-termeffects of ram pressure stripping (RPS) on star formation in clusterenvironments. It has been thought that the star formation activity of jellyfishgalaxies may depend on the host cluster properties, but previous studies havenot yet found a clear correlation. In this study, we estimate the \Ha-basedstar formation rates (SFRs) of five jellyfish galaxies in massive clusters($\sigma_{v, {\rm cl}}\gtrsim1000~{\rm km~s^{-1}}$) at $z\sim0.3-0.4$ usingGemini GMOS/IFU observations to explore the relationship. Combining our resultswith those in the literature, we find that the star formation activity ofjellyfish galaxies shows a positive correlation with their host clustervelocity dispersion as a proxy of cluster mass and dynamical states. We dividethe jellyfish galaxy sample into two groups with strong and weak RPS signaturesusing a morphological class. In the phase-space diagram, the jellyfish galaxieswith strong RPS features show a higher SFR and a stronger central concentrationthan those with weak RPS features. We estimate their SFR excess relative to thestar formation main sequence (starburstiness; $R_{\rm SB}={\rmSFR/SFR_{MS}}(z)$) and the density of the surrounding intracluster medium (ICM)using scaling relations with the cluster velocity dispersion. As a result, thestarburstiness of jellyfish galaxies with strong RPS signatures clearlyexhibits positive correlations with cluster velocity dispersion, ICM density,and strength of ram pressure. This shows that the relation between RPS and starformation activity of jellyfish galaxies depends on the host cluster propertiesand strength of ram pressure.

Enhanced Star Formation Activity of Extreme Jellyfish Galaxies in Massive Clusters and the Role of Ram Pressure Stripping