Hypoxia [O2 < 2.0 mL L-1 (87 μmol kg-1)] and severely hypoxic water masses [O2 < 0.5 mL L-1 (21.8 μmol kg-1)] are increasing in coastal marine ecosystems due to eutrophication and warming. Here, we investigate the response of the suboxic-tolerant endemic fish, Sufflogobius bibarbatus, to variations