What if India’s pathway to net zero does not end at factories—but begins where terrestrial meets the coastal? As carbon emissions rise and climate risks intensify, the search for solutions has largely remained confined to land-based approaches. Yet beneath the waves lies an overlooked trillion-dollar economic and ecological frontier, one that can absorb carbon, shield coastlines, and sustain growth. The question is no longer whether the blue economy matters, but why it remains on the margins of India’s climate strategy.