In pictures: California's neon blue tide
- Published
A dazzling neon blue tide in San Diego, California, has got people out on the beach snapping the waves.
The electric aqua colours are caused by a tide of blooming algae - by day the plankton turn the water red, but come nightfall they radiate a blue glow when the algae are disturbed by movement, such as waves crashing on to the shoreline.
, but the last red tide in San Diego was in 2013 - and it's no less beautiful each time they grace the oceans.
By UGC & Social news
- Published24 January 2013
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