Blood-red water has left popular beaches closed to swimmers in and about Sydney, Australia.
The "red tides," a rare natural phenomenon, were the result of algal blooms, the UK Daily Mail website said, citing Sydney's Ten News television.
The famous Bondi Beach was among the popular strands closed to swimmers, owing to health fears.
Contact with the algae can irritate skin and eyes. It is also known to cause fish kills and to render shellfish harmful to eat.
Visitors told of the crimson water's "fishy smell," and of its looking like "tomato sauce."
Red tide algal blooms seem to favor warm weather and water.
This could bode ill for area water enthusiasts later this week. High temperatures of 35 to 40 degrees C (95 to 104 degrees F) are forecast for Sydney Friday and Saturday.
Fish kill resulting from red tide algal bloom. (Photos.com/Brian Dombrowski)
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