Why is the ocean blue?

If I asked you what the color of water was, you’d probably say that it’s clear. And when you’re looking at the amount in a glass or a bath tub or even a swimming pool, it IS clear. But water is actually just a tiny bit blue. The amounts of water we generally see in our lives isn’t enough for the blue color to be visible. But when you get enough water to fill up a lake or an ocean, then the blue color is plain to see.

If little bubbles of air get trapped in ice, then it looks white. That’s why snow looks white. But when ice is solid, it’s blue tool. Most ice DOES have bubbles of air trapped in it. But sometimes large pieces of ice, like in a glacier, can melt and then refreeze. Air doesn’t have a chance to get trapped in the new refrozen ice, and it shows its true colors in spectacular stripes.

Snopes article on striped icebergs, with more pictures and good explanations