Regional fisheries management organizations (RFMOs) play an important role in resolving the problem of illegal, unreported, and unregulated (IUU) fishing. The efforts of RFMOs are varied, including monitoring fishing vessels through the use of vessel monitoring systems (VMS), but many, many challenges still exist. Further strengthening of the relationships between RFMO member countries and between other affected countries is important for reaching a solution to IUU fishing.