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Ram pressure stripping has been proven to be effective in shaping galaxyproperties in dense environments at low redshift. The availability of MUSEobservations of a sample of distant (z$\sim 0.3-0.5$) clusters has allowed tosearch for galaxies subject to this phenomenon at significant lookback times.In this paper we describe how we discovered and characterized 13 ram-pressurestripped galaxies in the central regions of two intermediate redshift(z$\sim$0.3-0.4) clusters, A2744 and A370, using the MUSE spectrograph.Emission line properties as well as stellar features have been analyzed toinfer the presence of this gas--only stripping mechanism, that producesspectacular ionized gas tails (H$_{\alpha}$ and even more astonishing[OII](3727,3729) departing from the main galaxy body. The inner regions ofthese two clusters reveal the predominance of such galaxies among bluestar-forming cluster members, suggesting that ram-pressure stripping was evenmore effective at intermediate redshift than in today's Universe.Interestingly, the resolved [OII]/H$_{\alpha}$ line ratio in the stripped tailsis exceptionally high compared to that in the disks of these galaxies, (whichis comparable to that in normal low-z galaxies), suggesting lower gas densitiesand/or an interaction with the hot surrounding ICM.

Observing ram pressure at work in intermediate redshift clusters with MUSE: the case of Abell 2744and Abell 370