Gigablue scales marine carbon removal by mimicking the ocean’s natural carbon pump to permanently store CO₂—safely, affordably, at gigaton scale. Its Microalgae Carbon Fixation & Sinking (MCFS) uses engineered, geo-specific substrates that sink on a controlled timeline, locking carbon in the deep ocean for centuries–millennia. Each deployment is tracked with in-situ sampling and precise MRV, developed with research partners and coastal communities.