Commercial fishing is one of the most highly regulated industries. While fishery management regulation varies throughout the world, it consistently controls what fish can be caught and where, the level of catch and catch methods.
Governments or Regional Fishery Management Organisations set limits on Total Allowable Catch (TAC) based on scientific analysis of the total biomass. Fishing quotas are allocated within the TAC. This regulates the volume of fish allowed to be caught, when, where and how fishing can take place. There are generally mandatory requirements for on-board observers, electronic Vessel Monitoring Systems, reporting of catch, by-catch and proportion of juveniles permitted.