Abyssal Plain
The deepest known portion of the ocean floor is called the Challenger Deep, located in the Mariana Trench in the western Pacific Ocean. It reaches a depth of approximately 36,201 feet (11,034 meters) below sea level.
The flat part of the ocean floor is called the abyssal plain. It is a smooth, flat region that lies between the continental rise and the mid-ocean ridges.
sea-floor spreading
The highest mountain on Earth that is below sea level is Mauna Kea in Hawaii. Its peak stands at approximately 13,796 feet (4,205 meters) above sea level, but if we measure from its base on the ocean floor, it reaches over 33,500 feet (10,210 meters) tall, making it taller than Mount Everest when measured from base to peak.
The top layer of the ocean floor is called the "abyssal zone" or "abyssal plain." This region is characterized by flat, sediment-covered areas that lie below the continental shelf. The abyssal zone is the deepest part of the ocean floor and is typically found at depths greater than 4,000 meters.
The ocean floor is not smooth.The ocean floor is made up of rocks, ledges and ditches.
Mariana Trench is the lowest place in the ocean, located 11 kilometers below sea level.
butt
The ocean is at sea level.
Crust mantle core
The deepest known portion of the ocean floor is called the Challenger Deep, located in the Mariana Trench in the western Pacific Ocean. It reaches a depth of approximately 36,201 feet (11,034 meters) below sea level.
Yes, in many places it is. But like the surface of the earth that you can see, the ocean floor has many different topographies. The ocean floor has mountains, volcanoes, deep valleys, and reefs. There vast areas of vegetation and areas that are devoid of vegetation, often due to how deep they are and how much sunlight penetrates. There are also arctic regions of ocean floor as well as tropical regions. The ocean floor is really as varied as the continents above the water.
Okinawa is an island. Some of it is above water -- that is where people live. The largest part of it is under water, and goes all the way down to the ocean floor.
The underside of a starfish has many sucker like legs that the starfish uses to walk over the ocean floor - it is not smooth.
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.
The Continental Shelf ; see related link below .
the abyssal plain