By drawing on oceanography (marine sciences) and limnology (freshwater sciences), social sciences, and the environmental humanities, the field of the blue humanities critically examines the planet's troubled seas and distressed freshwaters from various socio-cultural, literary, historical, aesthetic, ethical, and theoretical perspectives. Since all waterscapes in the Anthropocene are overexploited and endangered sites, the field calls for transdisciplinary cooperation and encourages thinking with water and thinking together beyond the conventions of tentacular anthropocentric thought. Working across many disciplines, the blue humanities, then, challenges the cultural primacy of standard sea and freshwater narratives and promotes disanthropocentric discourses about water ecologies. Engaging with the most pressing water problems, this Element contributes to those new discursive practices from a material ecocritical perspective. The authors' hypothesis is that fluid-storied matter and the new stories we tell can change the game by changing our mindset.