We take kelp as material entities immersed in a multitude of relations with other creatures (for whom kelp serves as both nourishment and shelter) and inorganic elements of the milieu it resides in, on the one hand, and as a figuration: a material-semiotic “map of contestable worlds” that encompasses entangled threads of “knowledge, practice and power” (Haraway 1997, 11) in its local and global sense, on the other. While drawing on our field notes from the congress and feminist posthumanities and (...) environmental humanities literatures (e.g. Alaimo 2016; Åsberg & Braidotti 2018; Sandilands & Erickson 2010; Iovino & Opperman 2014) – with a special focus on the so-called blue humanities/oceanic humanities (e.g. DeLoughrey 2019) – that unpack human/nonhuman relations in the context of the current environmental crisis and the accompanying “slow violence” (Nixon 2011), we mobilise a reflection on and make a proposal for “thinking with kelp” as a multi-faceted methodology of transversal and transdisciplinary knowledge production and practices: situated (Haraway 1988), enfleshed, transcorporeal (Alaimo 2010), collaborative, and committed to an ethics of multispecies response-ability (Haraway 2008). (shrink)