sea anemone the name for a group of marine creatures which resemble flower heads anchored to rocks and of which a few are edible. The snake-locks anemone, Anemonia sulcata, the best known, appears in Mediterranean markets. After being cleaned and (optionally) marinated, they can be made into a soup or used in an omelette or fried.
A related creature, Actinia equina, lacks a real English name but is tomate de mer in French, being the size of a tomato and red in colour. It is less edible, but can play a minor supporting role in fish stews or soups.