Swimming with sparkle

When the sea begins to glow, it feels like swimming through a waking dream. Marine biologist Helen Scales dives into the science and wonder of bioluminescence, from tropical shorelines dusted with living light to the deep ocean where creatures flash, flare and vanish in blue fire.

You'll need to subscribe to unlock this content. Already subscribed? Login?

Stay up to date with The Dip, our free weekly outdoor swimming newsletter.