Barnacles live only in the sea. They are related to crabs and lobsters.
Barnacles stick themselves to a surface and live there in the same place for their entire adult lives. You usually see them on the beach stuck to rocks, or stuck to the bottom of boats. They eat small sea creatures that drift past them in the water.
Bis forBarren (adjective)
A basement is a room that is underneath a house or other building. Basements are often used to store things you aren't using, and usually have water heaters, washing machines and other utilities in them. The term "basement" is US-centric. Other countries are more likely to have a cellar than a basement.