Atomic gas depletion timescale (≡ M_HI/SFR) as a function of the ratio of the sSFR to the main-sequence sSFR at a given redshift and stellar mass (Speagle et al. 2014). CGCG 137-068 and GRB/SN hosts (Michałowski et al. 2015, 2018a) are shown as a black square and red circles and arrows, respectively. The main sequence and its scatter are shown as a blue vertical solid line and the hatched region, respectively. For each galaxy, a black or green star shows the predicted gas depletion time for its SFR from the M_HI-SFR relation (Michałowski et al. 2015). The errors include both the uncertainty in the SFRs and in the parameters of the relation.