Lugworms are marine annelid worms found in sandy and muddy coastal environments. They play a crucial role in the ecosystem by aerating the sediment and recycling nutrients. Lugworms can grow up to 10 inches long and have a distinctive, segmented body that is often reddish-brown in color. These worms create U-shaped burrows in the sand, where they live and feed on organic matter. As they consume sediment, they extract nutrients and expel the remaining material, which helps improve soil quality. Lugworms are also an important food source for various marine animals, including birds and fish.