Thousands of dead sardines and anchovies washed up on a Chile beach in the country's Bio Bio Region. Environmental officials are investigating water quality in the region, off the coast of Coliumo peninsula, to determine the cause of the incident.

Watch | Thousands of dead fish wash up on a beach in Chile

Every year millions and millions of sardines trek along the cold currents off the South Africa coast during the southern hemisphere winter months, peaking in July. Countless dolphins and sharks hunt along the shoals - a spectacular sight that awes tourists lucky enough to find them.

Indian Ocean ballet: South Africa's breathtaking 'sardine run'

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