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The Pacific Ocean is the biggest ocean in the world, accounting for 32% of the world's total surface area. That's slightly more than all the land in the world combined.

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The densest planet in our solar system is our own Earth. The least dense is Saturn. If all the planets were placed in a massive ocean, only Saturn would float.

The ocean sunfish can lay up to 300 million eggs at a time. Being the heaviest bony fish in the world, their weight may reach 2,200lbs (1,000kg).

Alaska sits on the Pacific Ring of Fire, the most seismically active area in the world. There are an estimated 4,000 earthquakes each year in Alaska, more than all other 49 states combined.

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Male dolphins are called bulls, female dolphins are called cows and baby dolphins are called calves.

Dolphins sleep with only one side of their brain, keeping one eye open and one eye closed. They surface every 20 to 30 minutes to breathe, and they are never totally unconscious while sleeping.

Octopuses don't have tentacles, they have eight arms. Arms are more versatile than tentacles and can perform much finer movements.

The first ship to send out an SOS signal is the Cunard liner Slavonia, having sent the signal on June 10th, 1909. It is a myth that the RMS Titanic was the first ship to use the SOS distress signal.

About 10% of plastic made every year ends up being dumped into the ocean.

About 10% of plastic made every year ends up being dumped into the ocean.

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It's estimated that over 700 million gallons of oil are dumped into the oceans each year.

It is estimated that 50 to 70 percent of all the oxygen in our atmosphere comes from algae and bacteria found in our oceans.

It is estimated that 50 to 70 percent of all the oxygen in our atmosphere comes from algae and bacteria found in our oceans. Trees and plants only account for about 20% of the total oxygen produced.

Brazil is the largest country in South America, and 5th largest in the world.

Brazil is the largest country in South America, and 5th largest in the world. It's land area accounts for almost half of the entire South American continent.

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The Great Barrier Reef was discovered by captain James Cook, when his ship crashed into it. It took 7 weeks to repair his badly damaged ship.

The biggest garbage patch in the world is found in the Pacific Ocean. It's made up of tiny plastic particles which can't be seen, but pose danger to all marine life. By preventing reflecting sunlight the plastic starves the algae and plankton living below.

An octopus has nine brains and three hearts. It has one central brain plus eight additional brains inside each tentacle.

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