Vital coastal ecosystems such as coral reefs, seagrass meadows, and kelp forests serve as biodiversity hotspots and critical providers of ecological services. Collectively, they sustain fisheries, shield shorelines from erosion, and act as significant carbon sinks. Studies on coral reefs, seagrass, and kelp ecosystems emphasize their interconnectedness, where the health of one often influences the resilience of another. Human-induced stressors—rising sea temperatures, coastal pollution, and destructive fishing practices—are placing immense pressure on these habitats. Researchers are increasingly turning to restoration techniques, including coral transplantation, seagrass replanting, and kelp cultivation, to revive degraded ecosystems. Embracing innovative conservation frameworks that integrate ecological science with local community engagement is proving effective in maintaining long-term sustainability. Protecting these systems ensures not only the survival of countless marine species but also the livelihoods and well-being of coastal populations worldwide.