In a follow up to my story last year in National Geographic News, I report on a new study about deep sea sharks that glow in the dark. Julien Claes and Jerome Mallefet previously showed that velvet belly lantern sharks have glowing bellies, most probably to disguise their silhouettes when seen from below. Now it seems the same sharks also use light to warn off predators. Sharp spines on their backs illuminate like light sabers showing would-be intruders that they will get quite a mouthful.
Read the full story at National Geographic News.
Check out the film Jerome shot of the sharks – the first ever footage of glowing sharks – over at the Seamonster blog.