There was once an undersea post office in the Bahamas.
241
The Caspian Sea is also classed as the world's largest lake.
52
In 1992, 29,000 rubber ducks washed off a ship. They were found thousands of miles away 8 years later.
707
Jellyfish as a species are actually older than dinosaurs and sharks.
383
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
The Titanic is about as long as the Empire State building is tall.
174
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8