The mudflats and salt marshes of the Yser Estuary are teeming with life. A rich variety of algae and seaweed thrive here. These microscopic plants strengthen the mud flats thereby enabling plant species such as samphire to grow. Underwater life is a rich collection of shellfish, worms, slugs, crustaceans, etc. At low tide, some areas dry up creating salt marshes where many plant species grow. These marshes also attract wading birds such as curlews, dunlins and oyster catchers that come for their daily feed.