Scariest things found in the ocean...

Oceans

Maximum lifespan of 507 years is found in ocean Quahog. Minimum lifespan of 1-2 weeks is found in

The largest island in the Indian Ocean is -

Which of the following keeps the things on the surface of the Earth in place, but also holds the atmosphere and the oceans in place

Why green plants are not found a certain depth in the ocean ?