“When you go under (the water) and look back at the shore, it’s bright and clear, but when you turn around and look deeper ...

Both of these qualities can make the water appear sparkling blue. When the ocean is relatively calm and shallow ... this phenomenon occurs when light passes through water and absorbs colors in the red ...

cyclolites, however, this upwelling blue light serves as a directional cue, helping corals move toward deeper, calmer waters. “Many ocean-dwelling ... swim through the water, but the pulsed ...