Which is the world’s largest ocean basin?
How much does an adult blue whale weigh?
How much of the ocean floor has been mapped?
Which ocean is bound by the North American, European and Asian continents?
What can turtles mistake plastic bags for in the ocean?
What is a blue hole?
UK mains electricity has 230 Volts. What is the highest voltage electric eels produce?
What are gabions?
Where is the world’s largest coral reef?
How deep is the deepest point in the sea?
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