Which ocean is the largest on Earth?

What percentage of Earth's surface is covered by oceans?

What is the deepest known point in the ocean?

What is the average depth of the world's oceans?

Which famous oceanographer was nicknamed 'Captain Planet'?

What color is water in its purest form?

What percentage of Earth's oxygen comes from marine plants?

Which ocean current is nicknamed the 'Big Blue River'?

What year was the Titanic wreckage discovered?

What is the saltiest ocean on Earth?

Which sea has no coastline?

What percentage of marine life has yet to be discovered?

How many species of fish live in the ocean?

What is the average temperature of the ocean's surface water?

Which famous explorer first mapped the Gulf Stream?

What percentage of the world's volcanoes are underwater?

How long can a sea turtle hold its breath underwater?

What year was the first successful submarine built?

How fast can the fastest fish swim?

What percentage of all life on Earth lives in the ocean?