Dive into the mysterious and captivating world of seaweeds . Marine algae form one of the most diverse and dazzling organism groups on the planet - and have shaped the Earth's ecosystems for over 1.6 billion years , producing oxygen , storing blue carbon and sustaining life both in the sea and on land. In Seaweed , world-renowned marine botanist Professor Juliet Brodie reveals how these remarkable organisms underpin marine ecosystems , support biodiversity and even influence climate and weather patterns . From Arctic ice to tropical reefs , seaweeds thrive in every ocean environment - forming underwater forests , creating entire habitats and driving the ocean's carbon cycle . This beautifully illustrated guide reveals the hidden stories of evolution , biology and ecological importance behind each seaweed; from a strange symbiotic relationship with a solar-powered slug to gender-fluid reproductive strategies as well as their role in sustainability and climate change . Featuring 50 stunning species profiles from around the globe, Seaweed is both a scientific deep-dive and a celebration of some of the planet's most overlooked life forms - perfect for nature readers , ocean lovers , coastal foragers and anyone curious about how seaweed helps fight climate change .