Why is the ocean blue?

Question

legitimate answers only plz.

Answer 1

It's not really blue it's a greenish type color and it's because the sky reflects off of it.

Answer 2

Of the seven visible colors scattered from sun light Blue is the Most scattered Light. Thats why the Sky is Blue. Due to its high salty content ocean is having characters of reflecting and so it is Blue in color

Answer 3

The ocean looks blue because it reflects the color of the sky. When the sun is closer to it, the color is deeper. That's why it looks so blue in tropical places.

Answer 4

the ocean is not blue.

the ocean changes colors. it both reflects the sky, and shows the colors inside the ocean.

Answer 5

The ocean is blue (really blueish, there's lots of variation) for a different reason than why the sky is blue.  The sky is blue b/c the atmosphere scatters blue light more than any other wavelengths, but the ocean is blue b/c water actually absorbs the least amount of blue light, so more blue light than anything else comes back out of the water to your eyes.  So it really has more to do with absorption of every other color of light but blue.  Water is a good absorber of light....that's why the deep ocean is very dark.  

Other answerers correctly noted that algae, plankton, etc etc can give ocean water a greenish tint, etc.  I think there's actually some types of algae that make it red (I think that's how the Red Sea got its name maybe??)