Tardigrades glow blue to protect selves from UV light

A species of tardigrade shields itself from UV light using a glowing blue pigment, researchers have discovered.

Eswarappa found that like many other tardigrades, these Paramacrobiotus are resistant to ultraviolet radiation. After sitting under a germicidal UV lamp for 15 minutes ample time to kill most microbes and give humans a skin lesion all Paramacrobiotus specimens survived, seemingly unfazed by the ordeal.