19+ Ocean Trivia Questions and Answers

Let’s discover ocean facts and more through this ocean trivia collection.

Most of the earth’s surface is water, leaving us to wonder what kind of world lives underneath the oceans. The world’s oceans are a vast world of its own, filled with wonder, life, and beauty. From the North Pacific to the South Pacific waters, to around the Atlantic Ocean and beyond, there is so much to discover on and beneath the surface.

Ocean Trivia

The entire planet moves beyond what’s on land. Let’s look at some interesting ocean trivia that you probably didn’t know.

  • Ocean water contains about 20 million tons of gold in them.
  • The Indian Ocean contains the most coral reefs
  • The North Pacific Ocean has about 165,250,000 km2 of surface area.
  • Most marine life on the ocean floor can withstand water pressure up to 600 times that of the surface.

Ocean Trivia Questions and Answers

Let’s see how many ocean trivia questions you can answer! Challenge a friend while you’re at it. Best of luck to you!

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By area, what is the smallest ocean in the world?▶ The Arctic Ocean
What is the fastest fish in the Ocean?▶ Sailfish
Which ocean trench is the deepest?▶ Mariana Trench or Marianas Trench
What is the name of the deepest known location in the Earth’s oceans?▶ Challenger Deep
What’s the most diverse coral reefs system in the world?▶ The Coral Triangle
What’s the pressure at the bottom of the Mariana Trench?▶ 16,000 pounds per square inch or the equivalent weight of 100 fully grown elephants
What’s the deepest point of the Indian Ocean?▶ 7,258 m
What’s the deepest point of the North Atlantic Ocean?▶ 8,486 m
What’s the longest mountain range under the ocean?▶ The Mid-ocean Ridge
What is the largest ocean on planet Earth?▶ Pacific Ocean
What is the world’s largest coral reef system?▶ The Great Barrier Reef
What is the largest animal currently on Earth?▶ Blue Whale
What is the only sea on Earth with no coastline?▶ Sargasso Sea
What is the world’s largest ocean?▶ The Pacific Ocean
What spiny venous fish, common in home aquariums, has become an invasive species in the Caribbean Sea and U.S. Atlantic coastal waters?▶ Lionfish

About the Author


Tim majored in Humanities with a bachelor in English and Theatre at New York State University. He lectured on entertainment business studies for three years at Plymouth College.

Tim has been a trivia host in his current hometown of Pittsburgh for the past two years. He enjoys hanging out with people who love trivia just as much as he does.

His friends call him the Question Master.