ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY ALEXANDER SEMENOV / SCIENCE PHOTO LIBRARY
Lugworm. Close-up of the head of a lugworm (Arenicola marina). Lugworms are a marine species of annelid worm that have parapodia (hair-like outgrowths) and gills. They live in tubes in the seabed where they filter the sand for oxygen, and food.
Model release not required. Property release not required.