What makes the caribbean sea blue?

Question

What makes the caribbean sea blue?

Answer 1

The answer is scientific: Light absorption colors the water. Sunlight, composed of electro-magnetic radiation ranging in color from red to blue, is scattered by particles suspended in the water. The shorter blue wavelengths scatter more effectively and are absorbed less rapidly than the longer red and orange wavelengths. Seawater appears blue for about 100 feet under the surface, then becomes black with the absence of light. In essence, sunlight performs a tango on the water to account for the brightly colored Caribbean Sea. (By contrast, the Red Sea is red because it contains algae that release reddish-brown pigments; the Yellow Sea is yellow because rivers fill it with mud; and the Black Sea is black because it is essentially landlocked, resulting in little oxygen except near the surface and a bottom filled with hydrogen sulfide.)

Answer 2

The same reason why a shirt appears red. All the wavelengths of light are absorbed except the blue spectrum in the ocean which is reflected back to your eyes.