Sea wrack

The piles of algae and seagrasses found on the beach are known as sea wrack. The sea wrack is an assortment of seagrasses, algae, shells, and the remains of animals such as sponges and sea urchins.  This detritus (dead and decaying material) provides a prime feeding place for swarms of amphipods, insects, larvae and other fauna. These tiny creatures play a large role in breaking down organic matter and recycling nutrients – and are an important food source for fish and birds.