This chapter describes the international laws and institutions that have historic and emerging relevance to the trade-related aspects of fisheries. Within the law of the sea, various instruments, including UNCLOS, the Fish Stocks Agreement and voluntary FAO codes, seek to govern fisheries management. These approaches meet the definition of legal regimes offered in Chapter 1, and the first part describes first UNCLOS and the EEZ regime, then high seas, fish stocks and regional regimes and then the FAO fisheries management regime. The chapter then moves to examine international environmental law. The CITES regime is increasingly relevant to the trade in endangered marine species, while the Convention on Migratory Species addresses conservation obligations of range states and the Convention on Biological Diversity manages marine living resources. The final part of the chapter considers the WTO regime. In promoting liberalised international trade, the WTO covered agreements affect the trade in fish and fish products in many ways, and new disciplines on fisheries subsidies promise to focus trade law on fisheries sustainability in the future. In my consideration of these selected regimes within the law of the sea, international environmental law and international trade law, I also examine ways in which these areas of law ‘look outwards’ to other areas of international law.