Size: The average size of the thallus is 16″ across though smaller specimens are common.
Identifying features:U. lactuca is an edible green algae that is widely distributed around the world. This seaweed is eaten my many animals such as manatees and sea slugs. This seaweed is also a food source for many humans around the world.
Cool facts: when it is decomposing it produces large amounts of sulphide gas that has caused many health concerns in Britain.