• The amount of ice in Antarctica is much the same as the amount of water in the Atlantic Ocean.
  • Wrasses are a type of marine fish and a very unique one at that, in the sense that whenever a male fish dies, the dominant female in the group biologically changes its sex from female to male to replace him!
  • It so happens that nearly 90% of all volcanic activity is oceanic!
  • Seahorses, in spite of their rather unique name, are actually a type of fish! As far their body structure is concerned, they have fins and gills, just like any other normal fish.
  • It happens to be known as 'Challenger Deep' and is located at a whopping depth of 11,034 meters in the Mariana Trench, in the western part of the Pacific Ocean. Interestingly, if Mount Everest were to be moved from its location and placed at this particular spot, there would still be over 2000 meters of water above its peak!
  • The Pacific Ocean, which occupies around one-third of the Earth's surface and is the largest ocean in the world, is also home to more than 25,000 islands! That is more than the combined total of all the islands in all the other oceans.
  • Though, it is not the largest ocean in terms of size, the Atlantic Ocean is certain numero uno, when it comes to the tag of 'busiest ocean on Earth'. It happens to be the ocean which witnesses the maximum amount of sea traffic, in the form of passenger ships, cargo ships, etc.
  • Now, here's an interesting fact about marine biology. Billions and billions of fish eggs are laid in the oceans and the seas. However, only 1 in 1,000,000 fish eggs actually makes it to adulthood!
  • The first sign of life in the oceans was more than 3.3 billion years ago! In contrast, life on land began much later, approximately 400 million years ago.
  • Thanks to their ability of filtering more than a thousand gallons of water per day, sea sponges are sometimes referred to as the 'vacuum cleaners of the sea'!
  • Contrary to what many people believe, the blue whale, is not really the largest animal in the world. That particular title is awarded to the Lion's Mane jellyfish which, thanks to the length of its tentacles, can extend to a total length of around 140 feet!
  • Now, as far as the title of 'fastest fish in the ocean' is concerned, that particular honor goes to the swordfish and the marlin, both of which are capable of touching speeds of around 120 kph in short, rapid bursts.
  • As per present statistics, around 1.5 million unique marine species have been discovered, identified and classified by scientists. However, with scientists believing that there are a lot more marine species yet to be discovered or found, that number could only increase in the future.