The amount of HI-content in galaxies in clusters, filaments, and pure field. Top: M_HI as a function of stellar mass in different environments, indicated on top of each panel. The GAEA model data are shown with circles: small circles represent the GAEA-all set, and big circles represent one of the 300 realisations of the GAEA-mock sample. Big triangles show the C22 data. In all the samples, each point is coloured by sSFR. In each panel, the solid grey line shows the M_HI − M_⋆ scaling relation (Eq. (5)), the dotted line shows the 0.5 dex indent to highlight HI-deficiency zone. The faint red line represents HI-mass completeness limit from Eq. (1). Bottom: Fractions of HI-deficient galaxies (see Sect. 4.2) with 1σ confidence interval as a function of stellar mass.