Simplify the following text for a Grade 3 native English-speaking person.
Original: The International Hydrographic Organization ( IHO ) recognizes it as an ocean , although some oceanographers call it the Arctic Mediterranean Sea or simply the Arctic Sea , classifying it as one of the mediterranean seas of the Atlantic Ocean . Alternatively , the Arctic Ocean can be seen as the northernmost part of the all-encompassing World Ocean .
Simplified: The Arctic Ocean is the ocean around the North Pole .