But there is an enduring glow that has been around for far longer than those cute seasonal skeletons and monsters have been casting their charming spell: The bioluminescence created by plankton ...

Bioluminescent plankton, for example, prefer warm water with high salt concentrations. Though some bioluminescent organisms like the “green bomber” worm emit light to ward off predators ...

Instead he stared down at the waves lapping the shores of Dunraven Bay, Vale of Glamorgan, where bioluminescent plankton were lighting the water an incredible electric blue. Captured in the early ...