Gas properties, velocities and morphologies of galaxies in A2626 and the Swarm. Top left: H I deficiency vs. projected distance normalised by R200 for the non-substructure (green) and substructure (magenta) galaxies in A2626. The horizontal dashed lines present the range of H I deficiencies of the field galaxies. Top right: histogram of the distribution of H I deficiencies of galaxies in the Swarm. Bottom left: distribution of the non-substructure (green) and substructure (magenta) galaxies in A2626 in projected phase-space. The dashed black lines indicate the escape velocity. Bottom right: Six H I maps overlaid on DECaLS colour images for the most H I-deficient (top three) and the most H I-rich (bottom three) galaxies. The H I-deficient galaxies seem to be bright and yellowish with an offset or truncated H I discs. The H I rich galaxies are fainter and bluish, with extended H I discs.