The killer algae making Hong Kong’s water glow

Glow-in-the-dark blue waves caused by the phenomenon known as harmful algal bloom or 'red tide', are seen at night near Sam Mun Tsai beach in Hong Kong. Photo: Reuters

Along a seashore in Hong Kong yesterday, a vibrant blue glow was seen emanating from the water. Beautiful photographs show the shore glimmering, with the lights of the city sparkling in the background.

But this idyllic setting is potentially toxic.