The ocean covers more than 70% of Earth’s surface.

More than 80% of the ocean is unexplored and unmapped.

The Mariana Trench is the deepest part of the ocean.

Ocean water contains salt, minerals, and trace elements.

The largest animal on Earth, the blue whale, lives in the ocean.

Coral reefs support about 25% of all marine species.

Tides are caused by the moon’s gravitational pull.

Some fish can generate electricity to defend themselves.

The Great Barrier Reef is the world’s largest coral reef system.

Jellyfish have existed for over 500 million years.