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Sea Lettuce

Author: Nathan Troost and Jacob Lake

Scientific name: Ulva lactuca

Common name: Sea Lettuce

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.