Marine protected areas conserve fish populations and habitats, but their benefits for individual fish welfare are less studied than population and ecosystem effects.
Marine protected areas are primarily framed as conservation tools for population and ecosystem management, but they also deliver individual fish welfare benefits. Fish in no-take zones do not experience the trauma of capture, handling, and bycatch mortality. They live longer, reach larger sizes, and presumably experience lower chronic stress from avoidance of fishing gear. Expanding marine protection delivers both conservation and welfare benefits, though the welfare dimension of fisheries management has received far less attention than it merits given the scale of fish mortality in global fisheries.