This document presents an overview of the current legislation and common management practices for diadromous fishes across the Atlantic Area (Portugal, Spain, France and Ireland), produced as a deliverable (D14) of the Interreg Atlantic Area project DiadSea - Transnational Cooperation to Improve the Management and Conservation of Diadromous Fish at Sea (EAPA_0011/2022) Interreg. Here we give an overview of the shared EU framework, national and regional contexts which shape management priorities and approaches. Diadromous fish populations in the region face a range of complex pressures, and the management responses - including regulatory measures, scientific knowledge, habitat restoration and community involvement- are implemented through cooperation between agencies, research institutions and local stakeholders.