H I velocity field, where the known galaxies and previously detected clouds and tails in the IGM are labelled. As in Fig. 2, the two galaxies not detected in H I are outlined by black, dashed ellipses and the direction to the Fornax cluster is shown by the black arrow. The velocity colour bar is centred on the systemic velocity of the BGG (NGC 1316) at 1760 km s⁻¹. The grey circles indicate the sensitivity of the primary beam (Mauch et al. 2020) at 50%, 10%, and 2%. The red dashed circle denotes the 1.05° (0.38 Mpc) virial radius of the group as adopted in Drinkwater et al. (2001), where the restoring (33.0″ × 29.2″) beam and scale bar are shown in the bottom corners. The clouds that make up T_N have a new, extended component, effectively doubling the size compared to its original discovery in Serra et al. (2019).