Two hormones control bioluminescence in pygmy sharks, according to a study published online today (April 26) in The Journal of Experimental Biology. The sharks, which are about 8 inches in length, likely evolved their glowing stomachs as camouflage from predators. They swim hundreds of meters deep in the ocean while hunting jellyfish closer to the water’s surface. A lighter belly would help them blend into the light shining down on them from above by masking their otherwise obvious silhouette.
To read the full, original article click on this link: Glow-in-the-Dark Sharks | The Scientist
