The blue economy, introduced in 2010, refers to the sustainable use of ocean resources for economic growth, job creation, ocean health, and improved livelihoods. However, it faces challenges such as global warming, ocean acidification, and limited knowledge about the ocean, with 95% of the sea still unexplored. Other challenges include harmful algal blooms, invasive species, coral bleaching, and thermohaline circulation. This review discusses various aspects of the blue economy, including food, value-added products, offshore energy, oxygen source, mining, fisheries, carbon sequestration, and cloud seeding. It also explores future aspects such as sustainability, effective policies, and reducing carbon footprints and microplastics. Oceans cover 72% of the Earth's surface and contain 97% of the total water. They support global economies and are home to diverse ecosystems. Oceans absorb a third of atmospheric CO2 emissions and discharge more than 90% of excess heat, controlling global temperature and stabilizing the climate. The health of oceans is crucial for the survival of vulnerable communities. The concept of a blue economy was introduced at the 2012 UN Conference on Sustainable Development in response to the growing importance of the ocean and marine industries. It aims to achieve a balance between ocean industrialization and environmental protection, with potential economic value of USD 24 trillion. The blue economy includes goods and services such as food (fisheries and aquaculture), seaweed farming, and others. Fisheries and aquaculture supply 17% of global animal proteins, supporting 10–12% of the world's population. Aquaculture production is expected to grow at a median of 8% annually, while global population growth is at 1.6% per year. By 2030, aquaculture is expected to contribute 65% to the fish food supply. Seaweed farming has grown exponentially, with production reaching 23 million tons in 2012, worth over USD 6 billion. About 83% of this biomass is used for human consumption, with the rest used for animal feed, fertilizers, and biotechnological and medical purposes.The blue economy, introduced in 2010, refers to the sustainable use of ocean resources for economic growth, job creation, ocean health, and improved livelihoods. However, it faces challenges such as global warming, ocean acidification, and limited knowledge about the ocean, with 95% of the sea still unexplored. Other challenges include harmful algal blooms, invasive species, coral bleaching, and thermohaline circulation. This review discusses various aspects of the blue economy, including food, value-added products, offshore energy, oxygen source, mining, fisheries, carbon sequestration, and cloud seeding. It also explores future aspects such as sustainability, effective policies, and reducing carbon footprints and microplastics. Oceans cover 72% of the Earth's surface and contain 97% of the total water. They support global economies and are home to diverse ecosystems. Oceans absorb a third of atmospheric CO2 emissions and discharge more than 90% of excess heat, controlling global temperature and stabilizing the climate. The health of oceans is crucial for the survival of vulnerable communities. The concept of a blue economy was introduced at the 2012 UN Conference on Sustainable Development in response to the growing importance of the ocean and marine industries. It aims to achieve a balance between ocean industrialization and environmental protection, with potential economic value of USD 24 trillion. The blue economy includes goods and services such as food (fisheries and aquaculture), seaweed farming, and others. Fisheries and aquaculture supply 17% of global animal proteins, supporting 10–12% of the world's population. Aquaculture production is expected to grow at a median of 8% annually, while global population growth is at 1.6% per year. By 2030, aquaculture is expected to contribute 65% to the fish food supply. Seaweed farming has grown exponentially, with production reaching 23 million tons in 2012, worth over USD 6 billion. About 83% of this biomass is used for human consumption, with the rest used for animal feed, fertilizers, and biotechnological and medical purposes.