Main-sequence relation for galaxies coded according to their distance from the best fit derived for HI gas-rich late-type systems. Filled black dots show galaxies within 1σ from the relation, and filled grey dots show galaxies > 1σ above or below the relation. The solid line is the best fit obtained for gas-rich star-forming systems, and the dotted lines show the limits 1σ above and below the best fit. Galaxies undergoing a ram-pressure-stripping event identified in Boselli et al. (2022a) are indicated with coloured squares, and those subjected to a combined effect of ram pressure and harassment are shown by triangles. The typical uncertainty on the data is shown in the lower left corner.