Corruption in the fisheries and aquaculture sector has been gaining more attention in recent years. However, the characteristics of fishing, that allows for illegal catch to be transferred from one vessel to another at sea, and particularly the use of both flags and ports of convenience, make it difficult to know through which states the money is flowing. To better identify corruption vulnerabilities, UNDOC has divided the sector’s value chain into seven stages: preparation, fishing, landing, processing, sales, transit, and consumer, with different actors and different opportunities for corruption at each stage. Since Colombia’s fisheries sector is still small, there has been little research conducted on corruption in the area. Using this value chain approach, an assessment of vulnerable points for corruption in Colombian fisheries and aquaculture is made.