Crimson Tide
Updated:A red algae bloom has closed a number of beaches in Sydney, including Bondi Beach.
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1 A swimmer ignores advice not to swim in water affected by red algae bloom
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2 Others stayed within the safe confines of swimming pools
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3 The red algae, known as Noctiluca scintillans or sea sparkle, has no toxic effects
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4 However, the algae, which can be high in ammonia, can cause skin irritation
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5 The red algae bloom closed a number of beaches in Sydney
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6 A boy walks along the shore at Clovelly Beach
