9 words in this vocabulary list
noun a downward movement or slope
verb to move or fall downward
noun the process of keeping something on the surface of a liquid or gas
noun an animal lacking a backbone or internal skeleton, such as an insect, worm, or mollusk
adjective relating to the ocean or the sea
noun the branch of science that deals with the physical and biological aspects of the oceans
noun A person who travels by sea, especially a sailor or mariner.
noun a type of algae that lives symbiotically within the tissues of certain marine animals, such as corals
noun a line connecting the lowest points along the length of a riverbed or valley