Establishing marine sanctuaries is significant for fish populations as they provide safe environments for breeding, feeding, and growth, thus supporting sustainable fisheries. These protected areas help restore overfished populations by limiting fishing activities, resulting in increased biomass and biodiversity. Marine sanctuaries also protect critical habitats such as coral reefs and seagrass beds, which are vital for many fish species’ life cycles. Additionally, they enhance ecosystem health, resilience to climate change, and the overall productivity of marine systems, contributing to the long-term sustainability of ocean resources.