Why is the ocean blue although water is clear PS its not the salt?

The ocean is blue because water is a blue substance.

Many people are sure that bodies of water are blue because the water reflects the sky. But wouldn't this only make the shiny surface-reflections look blue? And doesn't water sometimes remain blue on cloudy days? Exactly. There's no mystery here; water looks blue because water *is* blue. Pure water is a blue chemical. It's not just the sky that creates the colors we see.