Since everything is measured at sea level then a continent would be above sea level thus higher than the sea floor which would be below sea level, but there are mountains under the sea that are every bit as high as the highest mountains on any continent.
Continental Shelf.
Molten meaterial
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This occurs in a subduction zone.
Slope
Continental Slope
Islands in an ocean don't belong to any continent. If they were part of a continent they wouldn't be islands would they? The African Continent is the continent nearest the Canary Islands, but the islands are the result of volcanic activity on the ocean floor.
An ocean to continent boundary is where the oceanic crust meets the continental crust. This typically occurs at a continental shelf, which is the gently sloping transition between the continent and the ocean floor. This boundary is marked by significant differences in physical and geological characteristics between the two crust types.
A sharp drop from a continent to an ocean basin is called a continental slope. This feature marks the boundary between the continental shelf and the deep ocean floor.
The transition zone between an ocean basin floor and a continent is known as the continental shelf. It is the submerged part of a continent that extends from the shoreline to the continental slope. The continental shelf is characterized by relatively shallow waters and is an area of high biological productivity.
About 71% of the surface of the earth is covered by ocean. That leaves about 29% in the continents. So there is roughly 2.5 times as much ocean as continent.
ocean-ocean ocean-continent continent-continent