Pacific cod in the eastern North Pacific are distributed from the Pacific Rim and southward to Southern California (Gustafson et al. 2001). In Alaska, significant migration of Pacific cod is known to occur within and between the Eastern Bering Sea (EBS), Aleutian Islands (AI), and Gulf of Alaska (GOA) regions (Shimada and Kimura 1994), and genetic studies indicate significant differences between spawning stocks in the EBS and GOA (Drinan et al. 2018)(Spies et al. 2019). Within the GOA there is some genetic differentiation within the Pacific cod population but it is managed as a single stock (Barbeaux 2021).