The ocean contributes significantly to Europe's economy, generating €624 billion and providing 3.6 million jobs in 2021 through the 'blue economy'. However, many ocean-related industries are emissions-heavy, with maritime transport responsible for 3-4% of EU emissions in 2019, projected to increase by 90% by 2050 without major changes. Sustainable initiatives like offshore wind farms and sustainable aquaculture are emerging, but face challenges such as supply chain bottlenecks and grid connection issues.