RGB images of the six studied galaxies. The galaxies are JO201 and JO206 (top row), JW100 and JO204 (middle row), JW39 and JO175 (bottom row). The images are obtained following the prescription given in Gullieuszik et al. (2023) and summarized in Sect. 2. The white and black contours separate the tail, extraplanar, and disk regions, as described in Sect. 2.1. The white shaded area highlights the disk region, which is not considered throughout this work. The two contours almost coincide in JW39 and JO175 (bottom left and bottom right panels, respectively). The blue squares and red dots mark the position of UV and Hα leaf clumps with robust mass estimates (Giunchi et al. 2023a; Werle et al. 2024), summarized in Sects. 2.2 and 2.3. The pink arrow points towards the centre of the galaxy cluster (taken from Cava et al. 2009 and Biviano et al. 2017).