Why “Blue” Doesn't Actually Exist in the Deep Blue Sea

Discover the "Great Cerulean Deception": the vibrant blue of our oceans and many animals isn't due to paint or pigment, but a fascinating trick of physics. Water absorbs most light, scattering only blue back to our eyes, while creatures utilize intricate structures to precisely reflect blue wavelengths. This structural color means blue is often a property of light itself, not a built-in hue.