The Gippsland Lakes are a chain of lakes in eastern Victoria, Australia. A combination of fire and floods changed the conditions of the water and led to the proliferation of Synechococcus, a photosynthetic cyanobacteria. But that wasn't what knocked everyone's socks off.
As summer took hold at the end of 2008, what happened surprised everyone – a new species called Noctiluca Scintillans began to prosper, by feeding on the Synechococcus.
In contrast to the widespread bright green of the Synechococcus, Noctiluca Scintillans was visible during the day as localised murky red patches, often building up on sections of shoreline facing the wind during the day. At night though, Noctiluca Scintillans produced a remarkable form of bioluminescence (popularly referred to as ‘phosphorescence’) – the water glowing brightly wherever there was movement – in the waves breaking on the shore, in ripples in the water and wherever people played in the water.
See more pictures of this phenomena at Phil's Blog. Link -via Monkeyfilter