What do you call things from the sea?

How are satellites able to map the ocean floor? Why would people attack a castle? What are strategic waterway? Why is it easier to float in the Atlantic Ocean compared to Lake Erie? What is the peninsula between the strait of hormuz and the Arabian sea? Where is the Isthmus of Suez located? What was the first beach found? Is there a town named River Heights in the US? Which began to form first the alps or the rocky mountains? What is the motto of Table Mountain National Park? What is the typical order of a food chain? What is the second coldest ocean in the world? How many people can fit in a wind tunnel? What are crenels? Is the north sea bigger than the baltic sea? Why cant lake Maracaibo be considered the largest lake in south America? What are the 10 largest earthen dams in the US? Why is the boreal forest bigger than the Amazon forest? Is manta at sea world Orlando scary? Where is the Sea Cliff Village Museum in Sea Cliff New York located?