大象传媒

How do aquatic creatures communicate when there is no light? One solution is to make their own and to witness this we have to use a low light camera. After dark every night, here in this bay in Puerto Rico, is the most amazing spectacle, which is only revealed when you dive into the water. The movement produces a ripple of sparkling lights, which is so intense, it appears like an aura around your body. But what's extraordinary is that this light is living light, produced by tiny creatures, called dinoflagellates. It's only when you get closer that you can see that there are literally millions of these tiny individual creatures that glitter like silver sequins. Special proteins act like the filament of a light bulb, but rather than electricity the energy comes from food. Like a burglar alarm, the lights are used to call in the police - larger predators who deal quickly with any attacker. And anything that touches them stimulates them to fluoresce.