Marine Protected Areas reduce fishing pressure and habitat destruction — with substantial benefits not just for fish populations but for the welfare of individual fish and marine life.
Marine Protected Areas are typically framed as conservation tools for fish populations and ecosystem health — but they also provide direct welfare benefits to individual fish and marine animals. Fish in heavily fished areas experience chronic stress from fishing pressure, habitat degradation, and reduced food availability. Protection from fishing allows fish to live longer, maintain larger body sizes, and experience less chronic physiological stress. The welfare dividend of marine protection is real even if it is rarely framed in welfare terms. Expanding and enforcing marine protected areas represents one of the most scalable actions possible to improve the welfare of the enormous numbers of fish and marine animals in the world's oceans.