In the increasingly surveilled space of the Mediterranean Sea, migrants engage in types of mobility that exclude them from a global sea commons. In Errant mobilities, Aguiar interprets mobility and the migrant subject by examining contemporary cultural works depicting maritime bordering space. Aguiar identifies an 'errant mobility,' a mode of movement that is erroneous, roving and wandering, that falls outside regulatory norms and therefore the protections afforded within authorised travel. She analyses works that focus on the passage of migrants, including humanitarian rescue documentaries, human rights digital projects, visual art incorporating salvaged objects and experimental film and literature refiguring navigation and geography. Aguiar reads these representations of movement and loss to mark an alternative subjectivity and a radical politics of movement that give rise to new decolonial imaginaries.