Cleaner, more pure water backscatters light in the blue range, which makes it look blue. One famous example is Crater Lake in ...

Blue-green algae are a type of aquatic bacteria ... they've advised the public to stay out of any discoloured or murky water. Any person who came into contact with discoloured water was also ...

SHARK!!! I couldn’t help it – images of this fearsome creature kept popping into my head as I watched the dive rope disappear into the murky blue water. SHARK!!! I couldn’t help it – images of this ...

As it happens, there are several factors that play a role in distinguishing the sparkly blue water of ... It's about what's in the water Somewhat counterintuitively, cloudy, grayish-looking ...