The theme of the seas has long been a central topic in scholarship on the Lusophone world, but more recent research has invested ocean crossings with new relevance and urgency. This special issue brings together a diversity of approaches, paying close attention to sea mobilities, what they entailed, and how they were practiced, and what meanings have been associated with them. Scholars also consider the performance or practice of movement in itself, from the efforts of ocean crossing to the subtleties of moving and the complexities of (maritime) kinetic life and the fabrication of migrant lives.