How does seaweed keep itself from drying out?

Seaweed has several adaptations to prevent drying out, primarily through its structure and biochemical properties. Many species possess a thick, gelatinous coating or mucilage that retains moisture and helps reduce water loss. Additionally, seaweed can regulate its exposure to air by changing its orientation with the tides and can also absorb water from the surrounding environment during periods of submersion. These adaptations enable seaweed to thrive in fluctuating conditions between high and low tides.